COMPONENT SUPPLY HEAD DEVICE AND COMPONENT MOUNTING HEAD DEVICE
A suction nozzle (65) of a reversing head device (22) has a distal end surface (65a) with a suction hole (65b) opened therein, and a suction passage (65c) communicated with the suction hole (65b) at one end thereof. A portion of the distal end surface (65a) outside of the suction hole (65b) abuts against bumps (39) of an electronic component (12). The suction hole (65b) is opposed with a gap to a portion of a mounting side surface (12a) where no bumps (39) are present. A vacuum pump (65) creates an air flow that flows from the gap between the suction hole (65b) and the mounting side surface (12a) into the suction passage (65c) through the suction hole (65b). The electronic component (12) is held at the distal end surface (65a) by a negative pressure generated by the air flow.
This is a divisional application of Ser. No. 11/596,577, which is the National Stage of International Application No. PCT/JP2005/008902, filed May 16, 2005.
BACKGROUND OF THE INVENTION1. Technical Field
The present invention relates to a component supply head device for holding a component at a mounting side surface to be mounted on a substrate at a take-out position, moving to a transfer position, and transferring the component to a mounting head device at the transfer position after reversing an orientation of the mounting side surface. Further, the present invention relates to a component mounting head device for holding a component at a non-mounting surface opposite to a mounting side surface to be mounted on a substrate, mounting the mounting side surface onto the substrate.
2. Description of the Related Art
As disclosed in Japanese Patent Application Laid-open Publication No. 8-37395, the above-described component supply head device comprises a suction nozzle for holding a component. The suction nozzle of the conventional component supply head device will be described with reference to
However, in the suction nozzle 3 shown in
As disclosed in Japanese Patent Application Laid-open Publication No. 2003-297878, the above-described component mounting head device also comprises a suction nozzle for sucking and holding a component. An example of the suction nozzle of the conventional component mounting head device will be described below with reference to
In the above-described mounting process, the electronic component 1 has to be heated so as to obtain a uniform temperature distribution in the area of the mounting side surface 1a of the electronic component 1 where the bumps 2 are formed (joining area). The nonuniform temperature distribution in the joining area causes non-uniform heating of the plurality of bumps 2, resulting in that the joining state of respective bumps 2 and substrate electrodes 220 corresponding thereto becomes random or nonuniform. As a result, joining defects occur between the electronic component 1 and the substrate 219. In the suction nozzle 118 shown in
It is an object of the present invention to provide a component supply head device capable of holding a component reliably and with a high degree of accuracy. It is another object of the present invention to provide a component mounting head device capable of heating the element so as to obtain a uniform temperature distribution in the joining area.
A first aspect of the invention relates to a component supply head device for holding a component at a mounting side surface with protruding electrodes to be mounted on a substrate, and reversing an orientation of the mounting side surface of the component to transfer the component to a component mounting head device so that the component mounting head device mounts the component onto the substrate. The component supply head device comprises a suction nozzle provided with a distal end surface where a suction hole is opened and a suction passage communicated with the suction hole at one end thereof. A portion of the distal end surface outside the suction hole abuts against the protruding electrode of the component. The suction hole is opposed with a gap to a portion of the mounting side surface on which the protruding electrodes are not provided. An air flow is generated by vacuum suction force acting from the other end of the suction passage. The air flow flows from the gap between the suction hole and the mounting side surface into the suction passage through the suction hole and generates a negative pressure to hold the component at the distal end surface.
The portion of the distal end surface of the suction nozzle outside the suction holes abuts against bumps, and the suction hole is opposed to the portion of mounting side surface on which the bumps do not exist. The air flow flowing into the suction passage from the gap through the suction hole is generated. The negative pressure (dynamic pressure) generated by the air flow holds the component at the suction nozzle. In other words, the suction nozzle of the component supply head device holds the component in a state where the distal end surface of the suction nozzle is not in contact with the mounting side surface. Therefore, a suction force uniformly acts upon the entire mounting side surface and the component can be held at the suction nozzle with a high degree of accuracy, without causing deformation of the component, such as warping, by an excess suction force. As a result, the accuracy of transferring the component from the component supply head device to the mounting head unit can be enhanced.
The suction hole comprises a center section communicated with the suction passage and a plurality of branch sections extending radially from the center section. The shape of the suction hole increases the uniformity of the suction force created by the negative pressure generated in the gap between the suction hole and the mounting side surface, thereby enhancing the accuracy of holding the component with the suction nozzle.
An outer dimension of the distal end surface is preferably set so that an outer peripheral edge of the distal end surface is positioned inside a peripheral edge of the component held by the suction nozzle and outside the protruding electrodes. Because the outer peripheral edge of the distal end surface of the suction nozzle is positioned on the inside of the peripheral edge of the component, when a component accommodated in a concave section of a tray is sucked and held, the suction nozzle can be prevented from interfering with wall surfaces constituting the concavity. Further, because the outer peripheral edge of the distal end surface of the suction nozzle is positioned outside the bumps, the bumps can be reliably abutted against the distal end surface in the portion outside the suction hole. Therefore, the component can be reliably held at the suction nozzle by the negative pressure generated in the gap between the suction hole and the mounting side surface.
A second aspect of the invention relates to a component mounting head device for holding a component at a non-mounting side surface opposite to a mounting side surface where a plurality of protruding electrodes are provided, and joining the protruding electrodes to corresponding substrate electrodes formed on a substrate to mount the component on the substrate. The component mounting head device comprises a heater for heating the component and a suction nozzle. The suction nozzle comprises a distal end surface where a suction hole is opened and a suction groove communicated with the suction hole is formed in an entire area corresponding to a joining area of the mounting side surface of the component where the protruding electrodes are provided, a proximal end surface opposite to the distal end surface abutting against the heater, and a suction passage communicated with the suction hole at one end thereof. The component is held at the distal end surface by a vacuum suction force acting from the other end of the suction passage.
Because the suction groove connected to the suction hole is formed in the entire area corresponding to the joining area of the component, the entire area of the non-mounting side surface of the component corresponding to the joining area is lightly sucked and held to the distal end surface of the suction nozzle by the suction force acting in the suction hole and suction groove. In other words, the component is sucked and held by the suction nozzle in a state where the component has a high degree of flatness, and warping of the component is substantially reduced. For example, in the case of a component of square shape with a size of about 10 mm and a thickness of about 0.1 mm, the warping is only about 5 μm. Because the component is tightly sucked and held to the suction nozzle in a state where the component has a high degree of flatness, the heat generated by the heater is uniformly transferred to the entire joining area of the component. As a result, the temperature distribution in the joining area becomes more uniform and the protruding electrodes are heated uniformly. Therefore, the plurality of protruding electrodes can be joined to the substrate electrodes in a uniform joining state.
The suction groove may be provided, in addition to the area corresponding to the joining area, outside the area corresponding to the joining area, that is, between the area and the peripheral edge of the suction nozzle.
The arrangement, dimensions, and shape of the suction groove are set so that a non-mounting side surface of the component is sucked and held to the distal end surface of the suction nozzle with a high degree of flatness according to such factors as the shape, dimensions including thickness, and material of the component.
The suction groove may be a combination of frame portions and lattice-like portions. More specifically, the suction groove comprises one closed pattern section disposed along the peripheral edge of the distal end surface, a plurality of first line sections disposed inside the closed pattern section so as to extend in a first direction and be communicated with the closed pattern section at both ends thereof, and a plurality of second line sections disposed inside the closed pattern to as to extend in a direction crossing the first direction and communicated with the first line sections intersecting therewith. The closed pattern section may be polygonal, e.g., quadrangular. Further, the closed pattern section may be in the form of a closed curve such as a circle or an ellipse. The first and second line sections may be straight lines, curved lines such as wavy lines, or polygonal lines.
As an alternative, the suction groove as a whole may have a lattice-like shape. Specifically, the suction groove comprises a plurality of first line sections disposed so as to extend in a first direction, and a plurality of second sections disposed so as to extend in a second direction crossing the first direction and communicated with the first line sections intersecting therewith.
As another alternative, the suction groove may comprise at least one closed pattern section disposed so as to surround a center of the area of the distal end surface corresponding to the joining area, and a plurality of line sections extending radially from the center of the area of the distal end surface corresponding to the joining area and communicated with the closed pattern section intersecting therewith. As described above, the closed pattern section may be polygonal, e.g., quadrangular. Further, the closed pattern section may be in a form of a closed curve such as a circle or an ellipse. The first and second line sections may be straight lines, curved lines such as wavy lines, or polygonal lines.
As yet another alternative, the suction groove can have the form of a single continuous line. Specifically the suction groove may be in the form of a spiral line or may have a rectangular wave-like shape.
The suction nozzle may comprise a recess formed in the distal end surface and separated from the suction hole. The recess is preferably disposed between the suction groove and the peripheral edge of the distal end surface. Even if the air is introduced from a very minute gap between the peripheral edge of the distal end surface of the suction nozzle and the electronic component sucked and held by the suction nozzle, the introduced air is heated while passing through the recess. As a result, the region of the distal end surface of the suction nozzle corresponding to the joining surface is prevented from being cooled by the air introduced from the gap. Therefore, providing the recess further improves the uniformity of temperature distribution in the joining area of the component held by the suction nozzle.
According to the suction nozzle of the component supply head device of the first aspect of the invention, the portion of the distal end surface outside the suction hole abuts against the bumps of the component, whereas the suction hole is opposed to the portion of the mounting side face of the component on which the protruding electrodes are not formed with the gap. This arrangement enables the suction nozzle to hold the component without causing deformation such as warping. Further, when the outer dimension of the distal end surface is set so that the outer peripheral edge of the distal end surface is positioned inside the peripheral edge of the component and outside the protruding electrodes, the distal end of the suction nozzle can be prevented from interfering with the wall surfaces constituting the concavity of the tray in which the component is accommodated. Therefore, the holding accuracy of the component by the suction nozzle is increased and the accuracy of transferring the component to the mounting head device and the component mounting accuracy can be increased. Therefore, accuracy of holding the component by the suction nozzle is enhanced, resulting in increased accuracies of transferring the component to the mounting head device and of mounting the component.
According to the second aspect of the invention, the suction groove connected to the suction hole is formed in the entire area corresponding to the joining area of the component in the distal end surface of the suction nozzle of the component mounting head device. This arrangement assures that the entire area of the non-mounting side surface of the component corresponding to the joining area is tightly sucked and held to the distal end surface of the suction nozzle and the component is sucked and held by the suction nozzle with a high degree of flatness. This results in the uniform temperature distribution in the joining area of the component, which causes the protruding electrodes to be heated uniformly. Therefore, the plurality of protruding electrodes can be joined to the substrate electrodes in the uniform joining state.
An entire configuration and operation of the electronic component mounting apparatus 11 will be described. The electronic component mounting apparatus 11 is an apparatus for performing a mounting operation of mounting electronic components 12 including, for example, chip components or bare IC chips onto a substrate 13. The electronic component mounting apparatus generally comprises a component supply section 14 which is an example of a component supply apparatus for accommodating a plurality of electronic components 12 so that they can be supplied and a mounting section 15 for performing a mounting operation of mounting the electronic components 12 supplied from the component supply section 14 on the substrate 13. Further, the electronic component mounting apparatus 11 comprises a control unit or controller 16 for controlling the operation of the component supply section 14 and mounting section 15.
Referring to
Further, the component supply section 14 will be described. Referring to
The plate translating device 18 shown only in
Referring to
Referring to
Referring to
Referring to
Referring to
Referring to
The recognition camera 26 with two fields (see
The overall operation of the component supply section 14 and mounting section 15 will be generally described below. The plate translating device 18 takes the wafer supply plate 29 out of the magazine 28 of the lifter 17, moves the plate in the Y axis direction, and supplies it to the plate disposing device 19. After the holding of the wafer supply plate 29 by the plate disposing device 19 (
The reversing head device 22 holding the electronic component 12 with the suction nozzle 65 moves in the X axis direction as far as a transfer position P2 (see
The mounting head device 24 to which the electronic component 12 has been transferred moves above the substrate 13 on the XY table 25. The substrate 13 is aligned with respect to the electronic component 12 held by the suction nozzle 118 of the mounting head device 24 according to the recognition results by the recognition camera with two fields 26. The alignment is achieved by the movement of the substrate 13 in the X and Y axis directions performed by the XY table 25. After this alignment, the mounting head device 24 mounts the electronic component 12 onto the substrate 13. Similar operations are executed with respect to the tray supply plate 30.
The component ejecting device 20 will be described below in greater detail with reference to
As shown in
Referring to
An upper end side of the spline shaft 85 is inserted into a hollow holder 55 fixed to the casing 83. As shown in
The operation of the component ejecting device 20 will be described below. As already described with reference to
The reversing head device 22 will be described below in detail. Referring to
Referring to
Further, as shown by a reference symbol t1 in
The shapes of the suction nozzle 65 and suction hole 65b are not limited to those shown in
The component mounting head device 24 will be described below in detail. Referring to
A rotary shaft mechanism 116 extending in the vertical direction is rotatably supported by the holder 112. A heater 117 for heating the electronic component 12 is fixed to a lower end side of the rotary shaft mechanism 116. Further, the suction nozzle 118 is attached in a replaceable manner to a lower side of the heater 117. In the present embodiment, the heater 117 is a pulse ceramic heater as a surface heater. However, the type of the heater is not specifically limited as long as it is adapted to heat the electronic component 12 held by the suction nozzle 118.
A pulley 120 is fixed to an upper end side of the rotary shaft mechanism 116. A motor 69 is fixed to the holder 112 so that the output shaft of the motor 69 is oriented vertically upward. A pulley 121 is fixed to an output shaft of the motor 69. A drive belt 122 is arranged between the pulleys 120, 121. Therefore, the rotation of the motor 69 is transmitted to the rotary shaft mechanism 116 through the pulleys 120, 121 and drive belt 122.
Referring to
Four suction holes 118c are opened in the distal end surface 118a. Four suction passages 118d each of which is communicated with respective suction holes 118c at one end thereof are formed in the suction nozzle 118. The other ends of the suction passages 118d are communicated with a cross-shaped aggregation groove 118e formed in the proximal end surface 118b. A suction passage 117a communicated with the aggregation groove 118e at one end thereof is formed in the heater 117. The other end of the suction passage 117a is connected to the vacuum pump 125 (shown only in
Further, a suction groove 126 communicated with the suction passage 118c are formed in the distal end surface 118a. As shown in
In the present embodiment, the suction groove 126 comprises one rectangular section (closed pattern section) 131 and a lattice-shaped section 132 disposed inside the rectangular section 131. The rectangular section 131 is formed along the peripheral edge of the distal end surface 118a. The lattice-shaped section 132 comprises three longitudinal straight line sections 133 and three lateral straight line sections 134. The longitudinal straight line sections 133 are disposed so as to extend in the up-down direction in
The electronic component 12 is sucked and held by the suction nozzle 118 at the non-mounting side surface 12b. A suction force (negative pressure) of the vacuum pump 125 is transferred to the suction holes 118c and suction grooves 126 through the suction passages 116a, 117a, and 118d, and the suction force acts on the non-mounting side surface 12b of the electronic component 12 from both the suction holes 118c and the suction grooves 126. Because the suction force acts on the non-mounting side surface 12b of the electronic component 12 not only from the suction holes 118c, but also from the suction grooves 126, the entire area of the non-mounting side surface 12b corresponding to the joining area 127 is tightly sucked and held to the distal end surface 118a of the suction nozzle 118. In other words, the electronic component 12 is sucked and held to the suction nozzle 118 in a state with a high degree of flatness and warping of the electronic component 12 is substantially reduced. Because the electronic component 12 is tightly sucked and held to the suction nozzle 118 with a high degree of flatness, the heat generated by the heater 117 is uniformly transmitted to the entire joining area 127 of the electronic component 12. As a result, the uniformity of temperature distribution in the joining area 127 is enhanced, and thus the bumps 39 are heated uniformly. Therefore, the bumps 39 can be joined to the substrate electrodes 135 in a uniform joining state.
In order for the suction nozzle 118 to suck and hold the electronic component 12 tightly and with the high degree of flatness, it is preferred that the suction grooves 126 be densely and uniformly disposed at least in the center region of the distal end surface 118a corresponding to the joining area 127. Referring to
Even if the air is introduced from a very minute gap between the peripheral edge of the distal end surface 118a of the suction nozzle 118 and the electronic component 12 sucked and held by the suction nozzle 118, the introduced air is heated while passing through the recess 137 and then passes to the center area of the distal end surface 118a. As a result, the region of the distal end surface 118a of the suction nozzle 118 corresponding to the joining surface 127 is prevented from being cooled by the air introduced from the gap. Therefore, providing the recess 137 in addition to the suction grooves 126 in the distal end surface 118a further improves the uniformity of temperature distribution in the joining area 127 of the electronic component 12 held by the suction nozzle 118. Other structures and operations of the alternative shown in
In the alternative shown in
In the alternative shown in
The alternative suction groove 126 shown in
In the alternative shown in
The shape, size, number, and arrangement position of the suction hole, suction grooves and recesses formed in the distal end surface of the suction nozzle 118 of the component mounting head device 24 are not limited to the above-described examples and can be easily set according to the size, and shape of the electronic components 12 and the number of bumps 39 so that the area of the non-mounting side surface 12b of the electronic component 12 corresponding to the joining area 127 is brought into tight contact with the distal end surface 118a of the suction nozzle 118.
Referring to
As shown in
As shown in
As described, the suction nozzle 65 of the reversing head device 22 holds the electronic component 12 in the state where the distal end surface 65a of the suction nozzle is not in contact with the mounting side surface 12a. Therefore, the suction force acts uniformly on the entire mounting side surface 12a and the electronic component 12 can be held by the suction nozzle 65 with high accuracy, without causing deformation such as warping due to the excess suction force. As a result, the accuracy of transferring the component from the reversing head device 22 to the component mounting head device 24 is enhanced. Further, suction grooves 126 communicated with the suction holes 118c are formed over the entire area corresponding to the joining area 127 of the electronic component 12 in the distal end surface 118a of the suction nozzle 118 of the component mounting head device 24. Therefore, the area of the non-mounting side surface 12b of the electronic component 12 corresponding to the joining area 127 is tightly sucked and held to the distal end surface 118a of the suction nozzle 118 with a high degree of flatness. As a result, the uniformity of temperature distribution in the joining area 127 is enhanced and the bumps 39 are heated uniformly. Therefore, the bumps 39 can be joined to the substrate electrodes 135 in a uniform joining state.
Although the present invention has been fully described with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art. Therefore, such changes and modifications should be construed as included in the present invention, unless they depart from the scope and spirit of the present invention.
Claims
1. A component supply head device for holding a component at a mounting side surface with protruding electrodes to be mounted on a substrate, and reversing an orientation of the mounting side surface of the component to transfer the component to a component mounting head device so that the component mounting head device mounts the component onto the substrate, comprising:
- a suction nozzle provided with a distal end surface where a suction hole is opened and a suction passage communicated with the suction hole at one end thereof, wherein a portion of the distal end surface outside the suction hole abuts against the protruding electrodes of the component, wherein the suction holes is opposed with a gap to a portion of the mounding side surface on which the protruding electrodes are not provided, and wherein an air flow is generated by vacuum suction force acting from the other end of the suction passage, the air flow flowing from the gap between the suction hole and the mounting side surface into the suction passage through the suction hole and generating a negative pressure to hold the component at the distal end surface.
2. The component supply head device according to claim 1, wherein the suction hole comprises a center section communicated with the suction passage and a plurality of branch sections extending radially from the center section.
3. The component supply head device according to claim 1, wherein an outer dimension of the distal end surface is set so that an outer peripheral edge of the distal end surface is positioned inside a peripheral edge of the component held by the suction nozzle and outside the protruding electrodes.
4. A component supply apparatus, comprising:
- the component supply head device according to claim 1;
- a component disposing section where a plurality of components are disposed so that they can be taken out by the suction nozzle; and
- a component supply and accommodation section for accommodating the components so that they can be disposed in the component disposing section.
5. A component mounting apparatus, comprising:
- the component supply apparatus according to claim 4;
- the component mounting head device for releasably holding the component;
- a substrate holding section for releasably holding the substrate; and
- a alignment device for aligning the substrate held by the substrate holding section and the component held by the component mounting head device.
6. A component mounting head device for holding a component at a non-mounting side surface opposite to a mounting side surface where a plurality of protruding electrodes are provided, and joining the protruding electrodes to corresponding substrate electrodes formed on a substrate to mount the component on the substrate, comprising:
- a heater for heating the component; and
- a suction nozzle comprising a distal end surface where a suction hole is opened and a suction groove communicated with the suction hole is formed in an entire area corresponding to a joining area of the mounting side surface of the component where the protruding electrodes are provided, a proximal end surface opposite to the distal end surface abutting against the heater, and a suction passage communicated with the suction hole at one end thereof, wherein the component is held at the distal end surface by a vacuum suction force acting from the other end of the suction passage.
7. The component mounting head device according to claim 6, wherein the suction groove comprises:
- a closed pattern section disposed along a peripheral edge of the distal end surface;
- a plurality of first line sections disposed inside the closed pattern section so as to extend in a first direction and communicated with the closed pattern section at both ends thereof; and
- a plurality of second line sections disposed inside the closed pattern so as to extend in a direction crossing the first direction, communicated with the closed pattern section at both ends thereof, and communicated with the first line sections intersecting therewith.
8. The component mounting head device according to claim 6, wherein the suction groove comprises:
- a plurality of first line sections disposed so as to extend in a first direction; and
- a plurality of second sections disposed so as to extend in a second direction crossing the first direction and communicated with the first line sections intersecting therewith.
9. The component mounting head device according to claim 6, wherein the suction groove comprises:
- at least one closed pattern section disposed so as to surround a center of the area of the distal end surface corresponding to the joining area; and
- a plurality of line sections extending radially from the center of the area of the distal end surface corresponding to the joining area and communicated with the closed pattern section intersecting therewith.
10. The component mounting head device according to claim 9, wherein the suction groove comprises a plurality of the closed pattern sections disposed concentrically with respect to the center of the area of the distal end surface corresponding to the joining area.
11. The component mounting head device according to claim 6, wherein the suction groove has a form of a single continuous line.
12. The component mounting head device according to claim 11, wherein the suction groove has a form of a spiral constituted by joining a plurality of line sections respectively extending in substantially the same directions to respective portions of the peripheral edge of the distal end surface.
13. The component mounting head device according to claim 11, wherein the suction groove has a rectangular wave-like shape comprising alternately connected first straight line sections extending in a first direction and second straight line sections extending in a direction crossing the first direction.
14. The component mounting head device according to claim 6, wherein the suction nozzle further comprises a recess formed in the distal end surface and separated from the suction hole.
15. The component mounting head device according to claim 14, wherein the recess is disposed between the suction groove and the peripheral edge of the distal end surface.
16. The component mounting head device according to claim 15, wherein the recess has a form of a closed pattern.
17. A component mounting apparatus comprising:
- the component mounting head device according to claim 6;
- a component supply apparatus for supplying the component to the component mounting head device;
- a substrate holding section for releasably holding the substrate; and
- a alignment device for aligning the substrate held by the substrate holding section and the component held by the component mounting head device.
Type: Application
Filed: Nov 27, 2009
Publication Date: Mar 18, 2010
Inventors: Shoriki NARITA (Osaka), Satoshi SHIDA (Osaka), Yasuharu UENO (Osaka), Makoto MORIKAWA (Osaka), Hironori KOBAYASHI (Osaka), Shuichi HIRATA (Osaka)
Application Number: 12/626,799
International Classification: B23P 19/00 (20060101);