COVER FOR ELECTRONIC DEVICE, ANTENNA ASSEMBLY, ELECTRONIC DEVICE, AND METHOD FOR MANFUACTURING THE SAME
A cover for an electronic device may include a metal plate having a first metal region formed of a metal; a through-hole formed in a portion of the first metal region of the metal plate; and an electrical open path extending from the through-hole to an end portion on one side of the first metal region through metal oxidation.
Latest Samsung Electronics Patents:
- Display device packaging box
- Ink composition, light-emitting apparatus using ink composition, and method of manufacturing light-emitting apparatus
- Method and apparatus for performing random access procedure
- Method and apparatus for random access using PRACH in multi-dimensional structure in wireless communication system
- Method and apparatus for covering a fifth generation (5G) communication system for supporting higher data rates beyond a fourth generation (4G)
This present application is a divisional of U.S. patent application Ser. No. 14/459,194 filed on Aug. 13, 2014, which claims the benefit of Korean Patent Application Nos. 10-2013-0096933 filed on Aug. 14, 2013 and 10-2014-0011684 filed on Jan. 29, 2014, with the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference.
BACKGROUNDThe present disclosure relates to a cover for an electronic device, an antenna assembly, an electronic device, and a method for manufacturing the same.
In general, antennas may be classified as external antennas installed outside of electronic devices and internal antennas installed inside of electronic devices. Interest in internal antennas has been increasing to provide various advantages in terms of ease in usage, a design, and the like.
With the advancement of communication technologies, portable terminals such as cellular phones have become multifunctional in order to provide functions such as a voice call, text communications, electronic payments, and the like, and antennas installed in portable terminals have also been diversified.
In addition, as development of portable terminals have moved towards high quality in terms of design, thicknesses of portable terminals have been increasingly reduced, while screens thereof have been increased in size. Thus, in order to reinforce strength thereof, metal is increasingly employed as a material for a cover (or a case, hereinafter generally referred to as a ‘cover’) forming an outer casing of electronic devices.
However, the employment of metal as a material for covers of portable terminals may negatively affect antenna performance in portable terminals and there may be negative aspects in that human bodies may be sensitive to electromagnetism from portable terminals formed of metal.
Thus, in the case of portable terminals, if antennas for main communications, as well for communications schemes such as a GPS, BT/Wi-Fi, or the like, are disposed on the upper and lower sides of portable terminals and the entirety of covers thereof are formed of metal, antenna performance may be degraded. In order to overcome the shortcomings, for example, a region of a cover in which an antenna is disposed may at least be formed of a material other than metal.
Also, in case of near field communications (NFC) antennas, increasingly employed in portable terminals, such NFC antennas may be disposed in an extra region, except for regions in which the antennas for main communication and for communications schemes such as GPS, BT/Wi-Fi, or the like, are disposed, as mentioned above. For example, the NFC antenna may be directly attached to a battery or attached to a battery cover. Namely, in consideration of arrangement areas of the other antennas, the NFC antenna may be disposed at the center of a rear surface of a portable terminal or in the vicinity of the center. In this case, however, such an arrangement of the NFC antenna may degrade performance when a metal cover is employed, which, thus, is a problem which remains to be solved.
As discussed above, there are limitations in forming the covers of existing portable terminals employing NFC antennas of metal, and thus, in some cases, upper and lower sides in which antennas for main communications and for communication schemes such as GPS, BT/Wi-Fi, or the like, are arranged are formed of a non-metallic material such as plastic.
However, the formation of a single cover of a portable terminal with different materials such as metal and a non-metallic material may result in a complicated process in terms of manufacturing and may be disadvantageous in terms of time and cost.
In addition, in a case in which an NFC camera is employed in a portable terminal including a metal cover, if an NFC antenna pattern coil is disposed on an inner surface of the metal cover, a repulsive magnetic field may be generated according to Lenz's law, resulting in the formation of an eddy current in a direction opposite a direction of a current flowing in the antenna pattern coil so as to interfere with current flow of the antenna pattern coil. This degrades performance of the NFC antenna.
In order to address this problem, in an existing portable terminal, there has been an attempt to form a physical slit such that a hole formed in a cover of a portable terminal communicates with an end portion of the edge of the cover formed of metal to reduce the generation of eddy currents to thus enhance antenna performance.
However, the formation of a slit in the metal cover may mar an aesthetic appearance of such a metal case. Thus, in order to prevent the slit from being exposed, an additional member needs to be attached and a surface thereof needs to be painted. Namely, additional operations need to be inevitably performed.
Meanwhile, as metal has been increasingly employed as a material of a cover of electronic devices such as smartphones as mentioned above, a need exists for a metal cover for an electronic devices used as an antenna.
SUMMARYAn exemplary embodiment in the present disclosure may provide a cover for an electronic device formed of metal that can be utilized as an antenna even without a physical slit and that can change a path of an eddy current using an electrical opening region and/or an open path without forming a physical slit therein, an antenna assembly, an electronic device, and a manufacturing method thereof.
According to an exemplary embodiment in the present disclosure, a cover for an electronic device may include: a metal plate having a first metal region and a second metal region formed of a metal; an electrical open path formed in the metal plate and configured to electrically separate the first metal region and the second metal region each other; and an antenna radiation part arranged in the second metal region.
In an exemplary embodiment in the present disclosure, the electrical open path may include: a concave recess having a concave shape disposed along the boundary between the first metal region and the second metal region; and a metal oxide layer formed by demetallizing the metal from an inner lower surface of the concave recess to the surface of the metal plate in which the concave recess is formed though metal oxidation.
According to a second exemplary embodiment in the present disclosure, a cover for an electronic device may include: a metal plate having a first metal region formed of a metal; a through-hole formed in a portion of the first metal region of the metal plate; and an electrical open path extending from the through-hole to an end of the first metal region through metal oxidation.
According to a third exemplary embodiment in the present disclosure, a cover for an electronic device may include: a metal plate having a first metal region formed of a metal; an electrical open region formed at a portion of the first metal region of the metal plate through metal oxidation; and an electrical open path extending from the electrical open region to an end of the first metal region through metal oxidation.
In the first, second, and third exemplary embodiment, the cover for an electronic device may further include a non-metallic member disposed on the metal plate to cover the electrical open path.
According to a fourth exemplary embodiment in the present disclosure, an antenna assembly may include: a cover for an electronic device with at least a portion thereof formed of a metal; and an antenna module disposed inside the cover for an electronic device, wherein the cover for an electronic device includes: a metal plate having a first metal region formed of a metal; a through-hole formed in a portion of the first metal region of the metal plate; and an electrical open path extending from the through-hole to an end of the first metal region through metal oxidation.
According to a fifth exemplary embodiment in the present disclosure, an antenna assembly may include: a cover for an electronic device with at least a portion thereof formed of a metal; and an antenna module disposed inside of the cover for an electronic device, wherein the cover for an electronic device includes: a metal plate having a first metal region formed of a metal; an electrical open region formed at a portion of the first metal region of the metal plate through metal oxidation; and an electrical open path extending from the electrical open region to an end of the first metal region through metal oxidation.
In the fifth exemplary embodiment in the present disclosure, the cover for an electronic device may further include a non-metallic member disposed on the metal plate to cover the electrical open region and the electrical open path.
According to a sixth exemplary embodiment in the present disclosure, an electronic device may include: a cover for an electronic device with at least a portion thereof formed of a metal; an antenna module disposed inside the cover for an electronic device; and a main body of the electronic device including an electric circuit electrically coupled to the antenna module, wherein the cover for an electronic device includes: a metal plate having a first metal region formed of a metal; a through-hole formed in a portion of the first metal region of the metal plate; and an electrical open path extending from the through-hole to an end of the first metal region through metal oxidation.
In the second, fourth, and sixth exemplary embodiment in the present disclosure, the electrical open path may include: a concave recess formed of a metal from the electrical open region to an end portion on one side of the first metal region; and a metal oxide layer formed by demetallizing the metal from an inner lower surface of the concave recess to the surface of the metal plate in which the concave recess is formed.
According to a seventh exemplary embodiment in the present disclosure, an electronic device may include: a cover for an electronic device with at least a portion thereof formed of a metal; an antenna module disposed inside the cover for an electronic device; and a main body of the electronic device including an electric circuit electrically coupled to the antenna module, wherein the cover for an electronic device includes: a metal plate having a first metal region formed of a metal; an electrical open region formed at a portion of the first metal region of the metal plate through metal oxidation; and an electrical open path formed by demetallizing the metal from the electrical open region to an end of the first metal region through metal oxidation.
In the first to seventh exemplary embodiment in the present disclosure, the metal may be formed by at least one among deposition, plating, and painting processes. The metal oxidation may be an anodizing process.
In the third, fifth, and seventh exemplary embodiment in the present disclosure, the electrical open region may include: a concave recess having a concave shape in a portion of the first metal region; and a metal oxide layer formed by demetallizing the metal from an inner lower surface of the concave recess to the other surface of the opposite side through metal oxidation.
The electrical open path may include: a concave recess formed of a metal from the electrical open region to an end portion on one side of the first metal region; and a metal oxide layer formed by demetallizing the metal from an inner lower surface of the concave recess to the other surface of the opposite side.
According to an eighth exemplary embodiment in the present disclosure, a method for manufacturing a cover for an electronic device may include: preparing a metal plate having a first metal region formed of a metal; and forming an electrical open path formed at a portion of the metal of the metal plate through metal oxidation to provide a second metal region electrically separate from the first metal region of the metal plate.
In the eighth exemplary embodiment in the present disclosure, the method may further include demetallizing a portion of the second metal region to form an antenna radiation part including an antenna pattern formed as a non-oxidized metal region by the demetallized portion.
The forming of an electrical open path may include: forming a concave recess along the boundary between the first metal region and the second metal region; and demetallizing the metal from an inner lower surface of the concave recess to the surface of the metal plate in which the concave recess is formed through metal oxidation to form a metal oxide layer.
According to a ninth exemplary embodiment in the present disclosure, a method for manufacturing a cover for an electronic device may include: preparing a metal plate having a first metal region formed of a metal; forming a through-hole in a portion of the first metal region of the metal plate to allow spatial electromagnetic waves to enter and exit therethrough; and demetallizing the metal from the through-hole to an end of the first metal region through metal oxidation to form an electrical open path.
According to a tenth exemplary embodiment in the present disclosure, a method for manufacturing a cover for an electronic device may include: preparing a metal plate having a first metal region formed of a metal; forming an electrical open region by demetallizing a portion of the first metal region through metal oxidation to allow spatial electromagnetic waves to enter and exit therethrough; and demetallizing the metal from the electrical open region to an end of the first metal region through metal oxidation to form an electrical open path.
In the first to tenth exemplary embodiment in the present disclosure, the metal may be formed by at least one of deposition, plating, and painting processes. Also, the metal may include at least one among aluminum, magnesium, zinc, titanium, stainless steel, and iron.
The above and other aspects, features and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings in the present disclosure.
The disclosure may, however, be exemplified in many different forms and should not be construed as being limited to the specific embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In the drawings, the shapes and dimensions of elements may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like elements.
Referring to
At least a portion of the metal plate 101 may be formed of a metal, and the metal plate 101 may include a first metal region 110 and a second metal region 120 formed of a metal.
For example, the entirety of the metal plate 101 may be formed of a metal, or a portion of the metal plate 101 may be formed of a metal.
Here, the metal may be formed by a least one of deposition, plating, and painting processes.
Also, the metal plate 101 according to an exemplary embodiment of the present disclosure may have a planar surface, a curved surface, a partially curved surface, or the like, and a shape and a surface form thereof is not particularly limited. However, the cover 100 for an electronic device including the metal plate 101 may be used as a metal cover of an electronic device that needs an antenna, and in this case, the metal plate 101 may have a shape and structure appropriate for the applied electronic device.
The electrical open path 130 may be formed by demetallizing (or unmetallating) a portion of the metal of the metal plate 101 through an oxidation process, to electrically separate the first metal region 110 and the second metal region 120 each other.
The metal oxidation process is an oxidation process performed to oxidize a metal into a nonmetal. For example, an anodizing process (or an anodic oxidation) may be applied as the oxidation process, but the present disclosure is not limited thereto.
The anodizing process may also be simply known as anodizing, a term that means [anode+oxidizing]. When a cathode rod and an anodic metal product (metal plate) are inserted into a reactor filled with an electrolyte, surfaces of the metal produce are corroded (hereinafter, referred to as “oxidation”) according to an oxidation equation below.
4Al+3O2→4Al3++6O2−→2Al2O3 Oxidation equation:
Here, in each embodiment of the present disclosure, a metal of the metal plate may include at least one among aluminum (Al), magnesium (Mg), zinc (Zn), titanium (Ti), stainless steel (SUS), and iron (Fe). However, the present disclosure is not limited thereto and any material may be used as long as it is conductive. Here, if a voltage of an anode is sufficiently high, erosion of an electrolyte, damage to a coating, and generation of the coating are repeated to grow the coating internally, and the coating becomes ceramic through a thickness thereof, resulting in the formation of a metal oxide layer having excellent electrical insulation, corrosion resistance, and wear resistance properties.
The anodizing process is proposed as an example of metal oxidation to help understand the present disclosure, and the present disclosure is not limited thereto.
The antenna radiation part 125 may be formed in the second metal region 120.
When the first metal region 110 and the second metal region 120 are electrically separated, although the first metal region 110 of the metal plate 101 is grounded, the second metal region 120 may be used as an antenna radiation part electrically separated from the first metal region 110.
For example, the antenna radiation part 125 may act as an antenna as the second metal region 120 itself is electrically connected or electromagnetically coupled to an electric circuit unit or an internal antenna inside an electronic device.
An electronic device regarding an exemplary embodiment of the present disclosure may be any electronic product that requires an antenna, such as a smartphone, a TV broadcast receiving set-top box, a notebook computer, a television set, or the like, and hereinafter, a portable terminal will mainly be described as an example of an electronic device, but the present disclosure is not limited thereto and any electronic product may be employed as an electronic device. Some examples thereof will be described with reference to
Referring to
The cover 100 for an electronic device may include a first metal region 110 and a second metal region 120 electrically separated by an electrical open path 130, and the second metal region 120 may include an antenna radiation part 125. Also, the cover 100 for an electronic device may include a through-hole 150 for a first camera, a through-hole for a camera flash, a through-hole for a speaker, and the like.
The main body 500 of the portable terminal may include an internal cover 510, a camera unit 520, a battery 530, and an internal camera 540.
The antenna radiation part 125 of the cover 100 for an electronic device may form an electrical connection or electromagnetic coupling with the internal antenna 540 of the main body 500 of the portable terminal. In this case, if the main body 500 of the portable terminal does not include the internal antenna 540, a connection unit or a coupling unit may be disposed instead of the internal antenna. In this case, the antenna radiation part 125 may be electrically coupled to an electric circuit unit through the connection unit or the coupling unit.
Also, in a case in which the antenna radiation part 125 is electrically coupled to the internal antenna 540 of the main body 500 of the portable terminal to feed power to the antenna radiation part 125, resonance, corresponding to the length of an electric conductor, may be formed by inductance according to a current flow in the antenna radiation part 125 and capacitance due to electronic coupling between the antenna radiation part 125 and the internal antenna 540 of the main body 500 of the portable terminal. Antenna performance such as a gain, a bandwidth, and radiation characteristics, and the like, may be enhanced using a resonance frequency. These components may be applied to each exemplary embodiment of the present disclosure.
Referring to
Referring to
The cover 100 for an electronic device may include a first metal region 110 and a second metal region 120 electrically separated by an electrical open path 130, and the second metal region 120 may include an antenna radiation part 125.
The main body 600 of the STB may include an electric circuit board equipped with an internal antenna 640 and an electric circuit unit.
Here, the antenna radiation part 125 of the cover 100 for an electronic device may form an electrical connection or electronic coupling with the internal antenna 640 of the main body 600 of the STB. If the main body 600 of the STB does not include the internal antenna 640, a connection unit or a coupling unit may be disposed instead of an internal antenna. In this case, the antenna radiation part 125 may be electrically coupled to the electric circuit unit through the connection unit and the coupling unit.
Referring to
Referring to
The cover 100 for an electronic device may include a first metal region 110 and a second metal region 120 electrically separated by an electrical open path 130, and the second metal region 120 may include an antenna radiation part 125.
The main body 700 of the notebook computer may include an electric circuit board equipped with an internal antenna 740 and an electric circuit unit.
Here, the antenna radiation part 125 of the cover 100 for an electronic device may form an electrical connection or electronic coupling with the internal antenna 740 of the main body 700 of the notebook computer. If the main body 700 of the notebook computer does not include the internal antenna 740, a connection unit or a coupling unit may be disposed instead of an internal antenna. In this case, the antenna radiation part 125 may be electrically coupled to the electric circuit unit through the connection unit and the coupling unit.
Referring to
In contrast, as illustrated in
As illustrated in
As mentioned above, the antenna radiation part 125 may act as an antenna through electrical connection or electromagnetic coupling with an electric circuit unit or an internal antenna inside an electronic device. Examples thereof will be described with reference to
Referring to
Referring to
In this case, capacitance C may be formed between the antenna radiation part 125 and the internal antenna 540 of the main body 500 of the portable terminal.
Referring to
For example, referring to a cross-sectional structure taken along line A-B of the metal plate 101, case 1 C1 shows a cross-sectional structure of an electrical open path 130 formed by performing metal oxidation in a state in which a lower surface of the metal plate 101 is masked with a masking material, with only a region to be oxidized left unmasked (that is, except for only a region to be oxidized). In an exemplary embodiment of the present disclosure, the masking material may be a masking film, a masking jig, or the like, serving to prevent a surface of the metal plate 101 from being oxidized through metal oxidation, but the present disclosure is not particularly limited to a masking material or a masking method.
Case 2 C2 shows a cross-sectional structure of an electrical open path 130 formed by performing metal oxidation in a state in which upper and lower surfaces of the metal plate 101 are masked with a masking material, respectively, with only regions to be oxidized left unmasked (that is, except for only regions to be oxidized).
Case 3 C3 shows a cross-sectional structure of an electrical open path 130 formed by performing metal oxidation on a lower surface of the metal plate 101, without masking, in a state in which a concave recess 131 is formed on a lower surface of the metal plate 101.
Case 4 C4 shows a cross-sectional structure of an electrical open path 130 formed by performing metal oxidation on both upper and lower surfaces of the metal plate 101, without masking, in a state in which a concave recess 131 is formed on a lower surface of the metal plate 101 and unmasked.
In case 5 C5, a non-metallic member 135 may be disposed on the metal plate 101 of case 1 C1 to cover at least the electrical open path 130.
In case 6 C6, a non-metallic member 135 may be disposed on the metal plate 101 of case 3 C3 to cover at least the electrical open path 130.
So far, the structures of the electrical open path 130 have been described by taking case 1 to case 4 as examples, but the present disclosure is not limited thereto.
In the metal plate 101, the portion where the electrical open path 130 is formed may weaken, and thus, in order to reinforce strength thereof, the non-metallic member 135 may be disposed on the metal plate 101. The non-metallic member 135 may be disposed in each of case 1 to case 4, and this will be described with case 5 and case 6, for example.
A separately manufactured non-metallic member 135 may be attached to the metal plate 101 or the non-metallic member 135 may be formed on the metal plate 101 through insert injection or outsert injection. Here, the arrangement of the non-metallic member 135 on the metal plate 101 is not limited to the foregoing examples.
For example, the electrical open path 130 should not have a metal component from a lower surface of the metal plate 101 to an upper surface thereof. For example, the electrical open path 130 should be demetallized to have an electrically infinite impedance. Thus, any method may be employed as long as it can oxidize the metal region of the metal plate 101 corresponding to the electrical open path 130 such that the metal region does not have any metal component from an upper surface and a lower surface thereof to thus have an infinite impedance, in consideration of a thickness of the metal plate 101, a metal oxidation time, a thickness of a metal region that may be demetallized through metal oxidation, and the like.
Here, the concave recess 131 may be formed on an inner surface of the metal cover such that it is not exposed outwardly when the metal cover is fastened to an electronic device. In an exemplary embodiment of the present disclosure, a cross-sectional structure of the electrical open path 130 as illustrated in
For example, in a case in which a thickness equal to 0.7 mm can be oxidized through an employed metal oxidation, if a thickness of the metal cover 100 is approximately 0.6 mm, an electrical open path may be sufficiently formed even without having to form a concave recess by oxidizing a metal having a thickness equal to 0.7 mm through metal oxidation.
In another example, in a case in which a thickness equal to 0.3 mm can be oxidized through an employed metal oxidation, if a thickness of the metal cover 100 is approximately 0.9 mm, a concave recess having a thickness equal to 0.7 mm may be formed and the remaining metal having a thickness equal to 0.2 mm may be subsequently oxidized through metal oxidation to sufficiently form an electrical open path.
Referring to
The electrical open path 130 may also include the concave recess 131 and a metal oxide layer 132 such as in case 3 C3 and case 4 C4 as described above.
Here, the concave recess 131 may concavely be formed along the boundary between the first metal region 110 and the second metal region 120.
The metal oxide layer 132 is a non-metallic ceramic layer formed by demetallizing the metal from an inner lower surface of the concave recess 131 to the other surface of the opposite side through metal oxidation.
Referring to
The cover 100 for an electronic device may be disposed inside or outside of an electronic device. For example, the cover 100 for an electronic device may be an external cover of an electronic device or an internal cover of an electronic device. In an exemplary embodiment of the present disclosure, for example, although the cover 100 for an electronic device is described as an external cover, the present disclosure is not limited thereto.
For example, the antenna module 200 may include an antenna sheet 210 and an antenna pattern coil 220 formed on the antenna sheet 210. Here, the antenna sheet 210 may include a magnetic material such as ferrite in order to attenuate an eddy current and increase current concentration of the antenna pattern coil 220. The antenna pattern coil 220 may have a loop shape or a spiral shape formed along the edges of the antenna sheet 210, and the present disclosure is not limited thereto.
The antenna module 200 may be disposed inside of the cover 100 for an electronic device. For example, the antenna module 200 may be disposed on an inner surface of the cover 100 for an electronic device, may be disposed on the internal cover 510 of the portable terminal 500 as an electronic device, or may be disposed on the battery 530.
The antenna module 200 may be disposed in any position as long as it is electrically coupled to an electric circuit unit of the main body 500 of the portable terminal and is electromagnetically coupled to the cover 100 for an electronic device, without being particularly limited.
However, for example, in a case in which the antenna module 200 is applied as an antenna for near-field communication (NFC), the antenna module 200 may be disposed in a position where electromagnetic waves may enter and exit through a portion of the cover 100 for an electronic device. This will be described with reference to
First, referring to
At least a portion of the metal plate 101 may be formed of a metal, and the metal plate 101 may include a first metal region 110 formed of a metal.
For example, at least a portion of the metal plate 101 may be formed of a metal, and the entirety of the metal plate 101 may be formed of a metal or a portion of the metal plate 101 may be formed of a metal.
Here, the metal according to an exemplary embodiment of the present disclosure may be formed by a least one of deposition, plating, and painting processes.
The through-hole may be formed in a portion of the first metal region 110 of the metal plate 101 to allow spatial electromagnetic waves to enter and exit therethrough. Here, in a case in which the through-hole 150 corresponds to a central position of the antenna sheet 210, a penetration hole providing a camera shooting path may be formed at a central position of the antenna sheet 210.
In an exemplary embodiment of the present disclosure, the through-hole 150 may be formed by removing a metal from an upper surface to a lower surface of the metal plate 101. The through-hole 150 may be filled with a nonmetal such as plastic, or the like. In an exemplary embodiment of the present disclosure, at least the through-hole refers to an open region having electrically infinite impedance.
For example, in a case in which the antenna module 200 is used for a low frequency (e.g., 13.56 MHz) as a short wave frequency like an NFC antenna, a hole such as a through-hole corresponding to an electrically open region is required, and an arrangement of the antenna module 200 in the vicinity of the through-hole may increase antenna efficiency.
The electrical open path 180 may be a portion formed by demetallizing the metal from the through-hole 150 to an end portion on one side of the first metal region 110 through metal oxidation. The electrical open path 180 may change an electromagnetic wave path (e.g., an eddy current) in the first metal region 110.
For example, when the antenna module 200 is disposed in the vicinity of the through-hole 150, entry and exit of an electromagnetic wave may be allowed. However, since the cover 100 for an electronic device is metal, a repulsive magnetic field according to Lenz's law may be generated in the cover 100 for an electronic device, forming an eddy current in the cover 100 for an electronic device in a direction opposite a direction of a current flowing in the antenna module 200, and the eddy current may interfere with the current flow in the antenna module 200 to degrade antenna performance.
Here, since the electrical open path 180 changes the path of the eddy current, influence of the eddy current on the current flow in the antenna module 200 may be reduced and, since the eddy current is distributed to the entire range of the cover 100 for an electronic device, an antenna recognition distance may be resultantly increased.
Referring to
Here, compared to the metal plate 101 illustrated in
The electrical open region 160 may be a nonmetal region formed by demetallizing a portion of the first meal region 110 of the metal plate 101 through metal oxidation, allowing spatial electromagnetic waves to enter and exit therethrough.
Here, the electrical open region 160 may be a ceramic region formed by oxidizing a metal through metal oxidation. The electrical open region 160 may allow spatial electromagnetic waves to enter and exit therethrough, like the through-hole 150.
For example, in the portable terminal 500 employing the antenna assembly, if it is not proper or not easy to arrange the antenna module 200 in the vicinity of the through-hole 150, the electrical open region 160 may be used to allow for the entry and exit of spatial electromagnetic waves. When the electrical open region 160 is used, an arrangement of the antenna module 200 may be freely determined regardless of through-hole.
As mentioned above, the electrical open path 180 is also a non-metal path formed by demetallizing the metal from the electrical open region 160 to an end portion on one side of the first metal region 110 through metal oxidation, changing a path of electromagnetic waves generated by the antenna module 200.
For example, when the antenna module 200 is disposed in the vicinity of the electrical open region 160, the entry and exit of electromagnetic waves may be allowed. However, since the cover 100 for an electronic device is metal, as mentioned above, a repulsive magnetic field according to Lenz's law may be generated in the cover 100 for an electronic device, forming an eddy current in the cover 100 for an electronic device in a direction opposite a direction of a current flowing in the antenna module 200, and the eddy current may interfere with the current flow in the antenna module 200 to degrade antenna performance.
Here, since the electrical open path 180 changes the path of the eddy current, influence of the eddy current on the current flow in the antenna module 200 may be reduced and, since the eddy current is distributed to the entire range of the cover 100 for an electronic device, an antenna recognition distance may be increased resultantly.
Referring to case 1 to case 4 (C1 to C4) illustrated in
Referring to case 1 to case 4 (C1 to C4) illustrated in
Referring to
Here, although the hole 150 for a camera will be described as an example of a through-hole in an exemplary embodiment of the present disclosure, but it is merely illustrative and the present disclosure is not limited thereto.
Referring to
For example, referring to a cross-sectional structure taken along line A1-A2 of the metal plate 101, case 1 C1 shows a cross-sectional structure of an electrical open region 160 formed by performing metal oxidation in a state in which a lower surface of the metal plate 101 is masked with a masking material, with only a region to be oxidized left unmasked (that is, except for only a region to be oxidized).
Case 2 C2 shows a cross-sectional structure of an electrical open region 160 formed by performing metal oxidation in a state in which upper and lower surfaces of the metal plate 101 are masked with a masking material, respectively, with only regions to be oxidized left unmasked (that is, except for only regions to be oxidized).
Case 3 C3 shows a cross-sectional structure of an electrical open region 160 formed by performing metal oxidation on a lower surface of the metal plate 101, without masking, in a state in which a concave recess 161 is formed on a lower surface of the metal plate 101.
Case 4 C4 shows a cross-sectional structure of an electrical open region 160 formed by performing metal oxidation on both upper and lower surfaces of the metal plate 101, without masking, in a state in which a concave recess 131 is formed on a lower surface of the metal plate 101 and unmasked.
In case 5 C5, a non-metallic member 165 may be disposed on the metal plate 101 of case 1 C1 to cover at least the electrical open region 160.
In case 6 C6, a non-metallic member 165 may be disposed on the metal plate 101 of case 3 C3 to cover at least the electrical open region 160.
So far, the structures of the electrical open region 130 have been described by taking the four cases as examples, but the present disclosure is not limited thereto.
In the metal plate 101, the portion where the electrical open region 160 is formed may weaken, and thus, in order to reinforce strength thereof, the non-metallic member 165 may be disposed on the metal plate 101. The non-metallic member 165 may be disposed in each of case 1 to case 4, and this will be described with case 5 and case 6, for example.
A separately manufactured non-metallic member 165 may be attached to the metal plate 101 or the non-metallic member 165 may be formed on the metal plate 101 through insert injection or outsert injection. Here, the arrangement of the non-metallic member 165 on the metal plate 101 is not limited to the foregoing examples.
Here, the concave recess 161 may be formed on an inner surface of the metal cover such that it is not exposed outwardly when the metal cover is fastened to an electronic device. Here, a lower surface of the metal plate may correspond to the inner surface, and an upper surface of the metal plate may correspond to an outwardly exposed surface.
Also, as illustrated in
Here, the non-metallic member 165 disposed to cover the electrical open path 160 and the non-metallic member 185 disposed to cover the electrical open path 180 may be separately formed, but in consideration of ease in process, the non-metallic member 165 and the non-metallic member 185 may be integrally formed.
Referring to
Or, the electrical open region 160 may include the concave recess 161 and a metal oxide layer 162 like in case 3 C3 and case 4 C4 as described above.
Here, the concave recess 161 may concavely be formed along the boundary between the first metal region 110 and the second metal region 120.
The metal oxide layer 162 is a non-metallic ceramic layer formed by demetallizing the metal from an inner lower surface of the concave recess 161 to the other surface of the opposite side through metal oxidation.
Referring to
For example, referring to a cross-sectional structure taken along line B1-B2 of the metal plate 101, case 1 C1 shows a cross-sectional structure of an electrical open path 180 formed by performing metal oxidation in a state in which a lower surface of the metal plate 101 is masked with a masking material, with only a region to be oxidized left unmasked (that is, except for only a region to be oxidized).
Case 2 C2 shows a cross-sectional structure of an electrical open path 180 formed by performing metal oxidation in a state in which upper and lower surfaces of the metal plate 101 are masked with a masking material, respectively, with only regions to be oxidized left unmasked (that is, except for only regions to be oxidized).
Case 3 C3 shows a cross-sectional structure of an electrical open path 180 formed by performing metal oxidation on a lower surface of the metal plate 101, without masking, in a state in which a concave recess 181 is formed on a lower surface of the metal plate 101.
Case 4 C4 shows a cross-sectional structure of an electrical open path 130 formed by performing metal oxidation on both upper and lower surfaces of the metal plate 101, without masking, in a state in which a concave recess 181 is formed on a lower surface of the metal plate 101 and unmasked.
In case 5 C5, a non-metallic member 185 may be disposed on the metal plate 101 of case 1 C1 to cover at least the electrical open path 180.
In case 6 C6, a non-metallic member 185 may be disposed on the metal plate 101 of case 3 C3 to cover at least the electrical open path 180.
So far, the structures of the electrical open region 180 have been described by taking the four cases as examples, but the present disclosure is not limited thereto.
In the metal plate 101, the portion where the electrical open region 160 is formed may weaken, and thus, in order to reinforce strength thereof, the non-metallic member 185 may be disposed on the metal plate 101. The non-metallic member 185 may be disposed in each of case 1 to case 4, and this will be described with case 5 and case 6, for example.
Separately manufactured non-metallic member 135, 165, or 185 may be attached to the metal plate 101 or the non-metallic member 135, 165, or 185 may be formed on the metal plate 101 through insert injection or outsert injection.
Here, the arrangement of the non-metallic member 135, 165, or 185 on the metal plate 101 is not limited to the foregoing examples. The non-metallic member 135, 165, or 185 may be any member as long as it is formed of a nonconductive material such as plastic, film, or the like.
Here, the concave recess 181 may be formed on an inner surface of the metal cover such that it is not exposed outwardly when the metal cover is fastened to an electronic device. Here, a lower surface of the metal plate may correspond to the inner surface, and an upper surface of the metal plate may correspond to an outwardly exposed surface.
Referring to
Or, the electrical open path 180 may include the concave recess 181 and a metal oxide layer 182 such as in case 3 C3 and case 4 C4 as described above.
Here, the concave recess 181 may concavely be formed along the boundary between the first metal region 110 and the second metal region 120.
The metal oxide layer 182 is a non-metallic ceramic layer formed by demetallizing the metal from an inner lower surface of the concave recess 131 to the other surface of the opposite side through metal oxidation.
The antenna assembly as described above may be employed in an electronic device such as a portable terminal. An electronic device according to an exemplary embodiment of the present disclosure may further include a main body including the electric circuit unit electrically coupled to the antenna module 200. Here, the electric circuit unit may be electrically coupled to an internal antenna and may transmit and receive a signal through the antenna module 200. In an exemplary embodiment of the present disclosure, a connection terminal of the electric circuit unit and a connection terminal of the antenna module 200 may be electrically coupled. In this case, the electrical connection is not particularly limited to a particular scheme and a general electrical connection scheme between two circuit modules may be employed.
For example, in a case in which the antenna module 200 is an NFC antenna, the electric circuit unit may include an NFC transceiver.
Referring to (
Referring to
Specifically, in
Referring to G11 and G12 in
Meanwhile, in
Referring to G21 and G22 in (b) of
A method for manufacturing a cover for an electronic device according to an exemplary embodiment of the present disclosure will be described with reference to
In describing the method for manufacturing a cover for an electronic device according to an exemplary embodiment of the present disclosure hereinafter, the descriptions made above with reference to
First, in operation S110, a metal plate 101 having a first metal region 110 formed of a metal may be prepared.
Next, in operation S120, in order to provide a second metal region 120 electrically separated from the first metal region 110 of the metal plate 101, a portion of the metal of the metal plate 101 may be demetallized through metal oxidation to form an electrical open path 130.
Referring to
Here, as for operations S120 and S130, the manufacturing order illustrated in
An example of operation S120 of forming the electrical open path 130 will be described.
First, referring to
Alternatively, in an exemplary embodiment of the present disclosure, during the process of forming the electrical open path 130, only the metal oxide layer 132 may be formed without the formation of a concave recess.
In describing the method for manufacturing a cover for an electronic device according to an exemplary embodiment of the present disclosure hereinafter, the descriptions made above with reference to
The method for manufacturing a cover 100 for an electronic device according to an exemplary embodiment of the present disclosure will be described with reference to
Next, in operation S220, a through-hole 150 may be formed in a portion of the first metal region 110 of the metal plate 101 to allow spatial electromagnetic waves to enter and exit therethrough.
For example, the through-hole 150 may be formed through a metal working process such as die casting, a computerized numerical control (CNC) process, or the like.
And then, in operation S230, in order to change a path of electromagnetic waves in the main metal region 110, an electrical open path 180 may be formed by demetallizing the metal from the through-hole 150 to an end portion on one side of the first metal region 110 through metal oxidation.
For example, the electrical open path 180 may be formed through a surface treatment process as post-processing of the metal working process.
An example of operation S230 of forming the electrical open path 180 will be described.
First, referring to
Alternatively, in an exemplary embodiment of the present disclosure, during the process of forming the electrical open path 180, only the metal oxide layer 182 may be formed without formation of a concave recess.
The method for manufacturing a cover 100 for an electronic device according to an exemplary embodiment of the present disclosure will be described with reference to
Next, in operation S320, in order to allow spatial electromagnetic waves to enter and exit through a portion of the first metal region 110 of the metal plate 101, an electrical open region 160 may be formed by demetallizing a portion of the first metal region 110 through metal oxidation.
And then, in operation S330, in order to change a path of electromagnetic waves in the main metal region 110, an electrical open path 180 may be formed by demetallizing the metal from the electrical open region 160 to an end portion on one side of the first metal region 110 through metal oxidation.
Here, as for operations S320 and S330, the manufacturing order illustrated in
An example of operation S230 of forming the electrical open region 160 will be described.
First, referring to
Alternatively, in an exemplary embodiment of the present disclosure, during the process of forming the electrical open region 160, only the metal oxide layer 162 may be formed without formation of a concave recess.
An example of operation of forming the electrical open path 180 will be described.
First, a concave recess 181 may be formed from the electrical open region 160 to an end portion on one side of the first metal region 110 and a metal from an inner lower surface of the concave recess 181 to the other surface of the opposite side may be subsequently demetallized through metal oxidation to form a metal oxide layer 182.
Alternatively, in an exemplary embodiment of the present disclosure, during the process of forming the electrical open path 180, only the metal oxide layer 182 may be formed without formation of a concave recess.
Referring to
Referring to
Referring to
Referring to
Referring to
Referring to
Referring to
Here, in an exemplary embodiment of the present disclosure, the concave recess may be formed on an inner surface of the metal cover such that it is not exposed outwardly when the metal cover is fastened to an electronic device. The lower surface of the metal plate may correspond to the inner surface and the upper surface of the metal plate may correspond to the outwardly exposed surface.
As set forth above, according to exemplary embodiments of the present disclosure, in an electronic device that requires an antenna, an electrical open region and/or open path may be utilized as an antenna even without a physical slit, and a path of an eddy current may be changed using an electrical opening region and/or open path without forming a physical slit on a metal cover, and thus, antenna performance may be enhanced.
Thus, since a physical slit is not present, an external design of a metal cover is not affected and an additional operation for removing drawbacks of a physical slit on appearance is not required.
While exemplary embodiments have been shown and described above, it will be apparent to those skilled in the art that modifications and variations could be made without departing from the spirit and scope of the present disclosure as defined by the appended claims.
Claims
1. A cover for an electronic device, the cover comprising:
- a metal plate having a first metal region formed of a metal;
- a through-hole formed in a portion of the first metal region of the metal plate; and
- an insulating region extending from the through-hole to an end of the first metal region.
2. The cover of claim 1, wherein the insulating region extends from the through hole to another end of the first metal region.
3. The cover of claim 1, wherein the metal is formed by at least one of deposition, plating, and painting processes.
4. The cover of claim 1, wherein the metal comprises at least one from a group consisting of aluminum, magnesium, zinc, titanium, stainless steel, and iron.
5. The cover of claim 1, wherein the insulating region is formed by demetallizing a portion of the metal of the first metal region through an oxidation process and the metal oxidation process is an anodizing process.
6. The cover of claim 1, wherein the insulating region comprises:
- a concave recess extending from the through-hole to one side of the first metal region; and
- a metal oxide layer disposed on a surface of the metal plate in which the concave recess is disposed and extending from an inner lower surface of the concave recess to the surface of the metal plate.
7. The cover of claim 1, further comprising a non-metallic cover disposed on the metal plate to cover the insulating region.
8. A cover for an electronic device, the cover comprising:
- a metal plate having a first metal region formed of a metal;
- an electrical open region formed at a portion of the first metal region of the metal plate; and
- an insulating region extending from the electrical open region to an end of the first metal region.
9. The cover of claim 8, wherein the insulating region extends from the electrical open region to another end of the first metal region.
10. The cover of claim 8, wherein the metal is formed by at least one of deposition, plating, and painting processes.
11. The cover of claim 8, wherein the metal comprises at least one from a group consisting of aluminum, magnesium, zinc, titanium, stainless steel, and iron.
12. The cover of claim 8, wherein the electrical open region is formed by demetallizing a portion of the first metal region and the insulating region is formed by demetallizing a portion of the metal of the first metal region through an oxidation process and the metal oxidation process is an anodizing process.
13. The cover of claim 8, wherein the electrical open region comprises:
- a concave recess having a concave shape formed in a portion of the first metal region; and
- a metal oxide layer disposed on a surface of the metal plate in which the concave recess is disposed and extending from an inner lower surface of the concave recess to the surface of the metal plate.
14. The cover of claim 8, wherein the insulating region comprises:
- a concave recess formed of a metal extending from the electrical open region to one side of the first metal region; and
- a metal oxide layer disposed on a surface of the metal plate in which the concave recess is disposed and extending from an inner lower surface of the concave recess to the surface of the metal plate.
15. The cover of claim 8, further comprising a non-metallic cover disposed on the metal plate to cover the electrical open region and the insulating region.
16. An antenna assembly comprising:
- a cover for an electronic device of claim 1; and an antenna module disposed inside the cover for an electronic device.
17. An antenna assembly comprising:
- a cover for an electronic device of claim 8; and
- an antenna module disposed inside the cover for an electronic device.
18. An electronic device comprising:
- a cover of claim 11;
- an antenna module disposed inside the cover for an electronic device; and
- a main body of the electronic device including an electric circuit unit electrically coupled to the antenna module.
19. An electronic device comprising:
- a cover of claim 8;
- an antenna module disposed inside of the cover for an electronic device; and
- a main body of the electronic device including an electric circuit unit electrically coupled to the antenna module.
20. A method for manufacturing a cover for an electronic device, the method comprising:
- preparing a metal plate having a first metal region formed of a metal;
- forming a through-hole in a portion of the first metal region of the metal plate to allow spatial electromagnetic waves to enter and exit therethrough; and
- demetallizing the metal from the through-hole to an end of the first metal region through metal oxidation to form an insulating region.
21. The method of claim 20, wherein the metal is formed by at least one of deposition, plating, and painting processes.
22. The method of claim 20, wherein the metal comprises at least one from a group consisting of aluminum, magnesium, zinc, titanium, stainless steel, and iron.
23. The method of claim 20, wherein the metal oxidation process is an anodizing process.
24. The method of claim 20, wherein the forming of an insulating region comprises:
- forming a concave recess from the through-hole to an end on one side of the first metal region; and
- demetallizing the metal from an inner lower surface of the concave recess to the surface of the metal plate in which the concave recess is formed through metal oxidation to form a metal oxide layer.
25. A method for manufacturing a cover for an electronic device, the method comprising:
- preparing a metal plate having a first metal region formed of a metal;
- forming an electrical open region by demetallizing a portion of the first metal region through metal oxidation to allow spatial electromagnetic waves to enter and exit therethrough; and
- demetallizing the metal from the electrical open region to an end of the first metal region through metal oxidation to form an insulating region.
26. The method of claim 25, wherein the metal is formed by at least one of deposition, plating, and painting processes.
27. The method of claim 25, wherein the metal comprises at least one from a group consisting of aluminum, magnesium, zinc, titanium, stainless steel, and iron.
28. The method of claim 25, wherein the metal oxidation process is an anodizing process.
29. The method of claim 25, wherein the forming of an electrical open region comprises:
- forming a concave recess in a portion of the first metal region; and
- demetallizing the metal from an inner lower surface of the concave recess to the surface of the metal plate in which the concave recess is formed through metal oxidation to form a metal oxide layer.
30. The method of claim 25, wherein the forming of an insulating region comprises:
- forming a concave recess of the metal from the electrical open region to an end on one side of the first metal region; and
- demetallizing the metal from an inner lower surface of the concave recess to the surface of the metal plate in which the concave recess is formed through metal oxidation to form a metal oxide layer.
Type: Application
Filed: Sep 30, 2016
Publication Date: Jan 19, 2017
Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD. (Suwon-si)
Inventors: Dae Seong JEON (Suwon-si), Jong Lae KIM (Suwon-si), Kang Ryong CHOI (Suwon-si)
Application Number: 15/281,541