Abstract: Aspects of the present disclosure generally relate to a magnetic recording head of a magnetic recording device that facilitates generating a downtrack magnetic bias field to enhance writing. During magnetic writing using the magnetic recording head, a bias current is directed in a cross-track direction on the trailing side of the main pole. Bias current flowing in the cross-track direction on a leading side of the main pole is reduced or eliminated. The bias current flowing in the cross-track direction on the trailing side of the main pole facilitates generating a magnetic field in a downtrack direction. The magnetic field in the downtrack direction is a bias field generated using the bias current. The magnetic bias field in the downtrack direction facilitates enhanced writing performance and increased areal density capability (ADC) for magnetic recording.

Abstract: A communication device employs a contactless secure communication interface to transmit and receive data with a computing device using close proximity extremely high frequency (EHF) communication. The communication device and the computing device periodically initiate a discovery operation mode, whereby the devices periodically transmit identifying information about the respective devices and listen for identifying information from the other device. Upon completion of the discovery mode operation, the devices enter a link-training operation mode and exchange capability information about the respective devices. During transport mode operation the communication device employs methods to manage access to data stored on the communication device by encrypting the data using one or a combination of training information or capability information as a basis for generating an encryption key.

Abstract: A communication device employs a contactless secure communication interface to transmit and receive data with a computing device using close proximity extremely high frequency (EHF) communication. The communication device and the computing device periodically initiate a discovery operation mode, whereby the devices periodically transmit identifying information about the respective devices and listen for identifying information from the other device. Upon completion of the discovery mode operation, the devices enter a link-training operation mode and exchange capability information about the respective devices. During transport mode operation the communication device employs methods to manage access to data stored on the communication device by encrypting the data using one or a combination of training information or capability information as a basis for generating an encryption key.

Abstract: Embodiments of the present disclosure generally relate to data storage devices, and more specifically, to a magnetic media drive employing a write head. The write head comprises a main pole and a monolithic side shield. A first leading shield is disposed below the side shield, and a second leading shield is disposed between the first leading shield and the side shield. The first leading shield has a greater throat height than a throat height of the second leading shield. A side shield throat height extending from the main pole to the side shield is shorter than the first leading shield throat height extending from the main pole to the first leading shield. The varying throat heights between the main pole, the side shield, and the first leading shield allow for enhanced cross-track recording density and reduce flux leakage from the main pole.

Abstract: A data storage device can be configured at least with a first spin-torque oscillator disposed between and contacting a write pole and a shield on an air bearing surface. A second spin-torque oscillator can be disposed between and contact the write pole and shield with the second spin-torque oscillator separated from the air bearing surface by a first stabilization distance and from the first spin-torque oscillator by a second stabilization distance. The first and second spin-torque oscillators can be configured to magnetostatically couple and phase lock to produce a single microwave frequency in response to a bias field.

Abstract: A method and system provide a magnetic transducer having an air-bearing surface (ABS). The magnetic transducer includes a main pole and at least one coil for energizing the main pole. The main pole includes a pole tip region and a yoke region. The pole tip region includes sidewalls, a bottom and a top wider than the bottom. At least one of the sidewalls forms a first sidewall angle with a down track direction at the ABS and a second sidewall angle with the down track direction at a first distance recessed from the ABS. The first sidewall angle is greater than the second sidewall angle.

Abstract: A magnetic transducer has an air-bearing surface (ABS). The magnetic transducer has a main pole, at least one coil for energizing the main pole and at least one additional pole. The main pole has a yoke and a pole tip having an ABS facing surface. The at least one additional pole is adjacent to the main pole in a down track direction. The additional pole is recessed from the ABS, has a front surface facing the ABS, has at least one side surface, and has at least one flare angle between the front surface and the at least one side surface. The at least one flare angle is measured from the ABS to the at least one side surface and is at least fifty degrees and less than ninety degrees.

Abstract: A method and system for providing a perpendicular magnetic recording transducer are disclosed. The method and system include providing a metallic underlayer and providing an insulator, at least a portion of which is on the metallic underlayer. The method and system also include forming a trench in the insulator. The bottom of the trench is narrower than the top of the trench and includes a portion of the metallic underlayer. The method and system also include providing a nonmagnetic seed layer that substantially covers at least the bottom and sides of the trench. The method and system also include plating a perpendicular magnetic pole material on at least a portion of the seed layer and removing a portion of the perpendicular magnetic pole material. A remaining portion of the perpendicular magnetic pole material forms a perpendicular magnetic recording pole.

Abstract: A magnetic writer has a magnetic pole with projections extending laterally and symmetrically from each side. The pole tip of the magnetic pole is positioned at the ABS of the writer where it is surrounded in a mirror-symmetric fashion by side shields that are co-planar with the ABS. The projections can be the ends of a rectangular bar of soft or hard magnetic material, different than the main pole material, passing completely through the main pole and parallel to the ABS or they can be part of the peripheral shape of the main pole without changes to its material structure. In either case, they impart a shape anisotropy to the main pole and dilute the otherwise concentrated magnetic flux emerging from the pole tip that cause flux leakage from the side shields and undesirable adjacent track interference.

Abstract: A magnetic head according to one embodiment includes a side gap layer comprising primarily silicon nitride, wherein outer sides of the side gap layer taper away from one another from a leading end of the side gap layer towards a trailing end of the side gap layer; a seed layer above the silicon nitride side gap layer; and a magnetic pole on the seed layer. A method for forming a magnetic head according to one embodiment includes etching a channel in a silicon oxide layer; forming a side gap layer comprising primarily silicon nitride in the channel; forming a seed layer above the side gap layer; plating a pole on the seed layer; and removing the silicon oxide layer by wet etching. Additional systems and methods are also presented.

Abstract: A magnetic recording head comprises a write pole including a throat region with a leading edge, a trailing edge opposite the leading edge, and first and second side edges opposite one another. The magnetic recording head further comprises a first side wall gap layer disposed alongside the first side edge of the throat region, and a second side wall gap layer disposed alongside the second side edge of the throat region. Each of the first and second side wall gap layers has a first width at the leading edge of the throat region smaller than a second width at the trailing edge of the throat region.

Abstract: A recording head having a narrowed track has a high recording magnetic field strength and a high recording magnetic field gradient has certain problems which may be difficult to overcome. In one embodiment, a magnetic film, which overhangs from a track width, is provided on a trailing side of a. region retracted from an ABS of a main pole facing a recording medium. Thereby, a magnetic field strength on the trailing side is increased so that a difference in distribution of magnetic field strength defined by a geometrical bevel angle given to the main pole is increased. Consequently, writing performance of the main pole is improved while forming a large magnetic clearance angle with respect to an adjacent track and suppresses writing into an adjacent track when skew occurs. Other systems and methods are also disclosed regarding a head with a high recording magnetic field using an overhanging magnetic film.

Abstract: A transducing head for use with a storage medium rotatable about an axis includes first and second writers for writing to the storage medium. The first writer is configured for dedicated writing to a first radial region of the storage medium, and the second writer is configured for dedicated writing to a second radial region of the storage medium. The second radial region is located radially outward from the first radial region.

Abstract: A microwave assisted magnetic recording writer is disclosed with an octagonal write pole having a top portion including a trailing edge that is self aligned to a spin transfer oscillator (STO). Leading and trailing edges are connected by two sidewalls each having three sections. A first section on each side is coplanar with the STO sidewalls and is connected to a sloped second section at a first corner. Each second section is connected to a third section at a second corner where the distance between second corners is greater than the distance between first corners. A method of forming the writer begins with a trapezoidal shaped write pole in an insulation layer. Two ion beam etch (IBE) steps are used to shape top and middle portions of the write pole and narrow the pole width to <50 nm without breakage. Finally, a trailing shield is formed on the STO.

Abstract: A system according to one embodiment includes a write pole having an end region positioned towards an air bearing surface, a first flare point, and a second flare point positioned between the air bearing surface and the first flare point; and a shield positioned above the write pole, wherein a cross sectional area of the write pole at a point between the first and second flare points along a plane passing through the write pole and oriented about parallel to the air bearing surface is greater than a cross sectional area of the end region of the write pole along a plane oriented parallel to the plane passing through the second flare point. Additional systems and methods are also presented.

Abstract: A magnetic recording head includes a write pole comprising a throat region. The throat region includes a lower portion having a substantially trapezoidal cross-section, and an upper portion having a substantially rectangular cross-section. In a beveled region of the write pole, the substantially rectangular cross-section of the upper portion decreases in height towards an air bearing surface of the magnetic recording head.

Abstract: A magnetic pole of a magnetic head includes a narrow and a wide portion, and is formed of a plating film. An electrode film forms the plating film, and is provided only under at least a part of the wide portion. A manufacturing method for the magnetic head includes: forming a plating-film-accommodating layer with an accommodating groove; forming the electrode film in part of the accommodating groove; and forming the plating film in the accommodating groove by plating using the electrode film. The accommodating groove includes a narrow and a wide groove portion for accommodating the narrow and wide portions, respectively. The electrode film is provided only in at least a part of the wide groove portion. In the step of forming the plating film, the plating film grows from the surface of the electrode film, and the narrow groove portion is filled with a part of the plating film.

Abstract: In a perpendicular magnetic recording head in which a magnetic pole part of a main magnetic pole layer exposed at a medium-opposing surface exhibits a trapezoidal form narrower at a leading edge than at a trailing edge on the return yoke layer side, a bottom shield layer made of a soft magnetic material is provided below the leading edge of the magnetic pole part of the main magnetic pole layer in the track width direction while interposing a nonmagnetic material layer therebetween. The gap between the bottom shield layer and the leading edge of the magnetic pole part is set to less than 60 nm.

Abstract: A stepped main pole for a perpendicular write head and methods of making the stepped main pole. The stepped main pole has a main pole tip and a base portion. The main pole tip has a surface that forms part of the ABS and a first thickness. The base portion extends from the main pole tip and has a thickness that varies from the first thickness to a second thickness to form a slanted surface with an apex angle adjacent the main pole tip. By placing the base portion away from the ABS and providing a thickness that increases in a direction away from the ABS, the stepped pole can provide the necessary magnetic flux for writing, while avoiding undesired leakage and fringing. To form embodiments of the stepped main pole of the invention, a fluorine-based reactive ion etch (RIE) may be used. By using an RIE to define the stepped main pole, the apex angle can be better controlled and tight edge control can be achieved.

Abstract: A main pole layer with a tapered trailing side is disclosed that has three sections each with a write pole portion along the ABS and a yoke portion. A lower section has a bottom surface including a leading edge at the write pole tip and sidewalls with a bevel angle between 4 and 20 degrees. The middle section has essentially vertical sidewalls with a tapered side starting at the trailing edge and extending to a back side of the write pole and into the yoke. An upper section includes a portion of the tapered side and a top surface of the main pole layer and has a sidewall with a bevel angle from 0 to 45 degrees. The thickness of the middle section is greater than the pole height variation caused by variations in back end processes including ion milling and lapping to reduce erase width (EW) variations.

Abstract: A method provides a structure in a magnetic recording transducer. The structure resides on an underlayer. The method includes providing a protective layer and providing layer(s) for the structure. The protective layer covers a field region but exposes a device region in which the structure is to reside. A first portion of the layer(s) reside in the device region, while a second portion of the layer(s) reside in the field region. The method also includes removing the second portion of the layer(s) using an over-removal condition. The underlayer is covered by a remaining portion of the protective layer after the removing step is completed. The method also includes removing the remaining portion of the protective layer. An underlayer removal rate is substantially less than a protective layer during the step of removing of the protective layer.

Abstract: In a perpendicular magnetic recording head in which a magnetic pole part of a main magnetic pole layer exposed at a medium-opposing surface exhibits a trapezoidal form narrower on the leading edge side than on the trailing edge side, a pair of partial side shield layers made of a soft magnetic material are provided on both sides in the track width direction of the magnetic pole part of the main magnetic pole layer such as to be located more on the leading edge side of the magnetic pole part.

Abstract: Embodiments of the present invention provide a head stack assembly and a manufacturing method thereof in which manufacturing costs as a multi-disc magnetic device are reduced by increasing the yield and reducing inventory of magnetic heads which can be assembled to the head stack assembly. According to one embodiment, a head stack assembly and a manufacturing method thereof includes plural actuator arms to which magnetic heads are assembled through suspensions. The tolerance of the core width or the write element width of the magnetic heads assembled to inside actuator arms of the plural actuator arms is set to be narrower than the tolerance of the core width or the write element width of the magnetic heads assembled to the outside actuator arms.

Abstract: Methods and structures for the fabrication of a thin film, perpendicular recording write head are disclosed. The fabrication involves the deposition of two different oxide layers which have mutually high etch selectivities. This characteristic allows a write pole structure to be built wherein the track width is independent of the location of the flare point. The process also produces a structure wherein the throat height of the shield is self aligned to the location of the flare point of the write pole.

Abstract: In a perpendicular magnetic recording head in which a magnetic pole part of a main magnetic pole layer exposed at a medium-opposing surface exhibits a trapezoidal form narrower at a leading edge than at a trailing edge on the return yoke layer side, a magnetic shield layer having a pair of side shield parts separated at the leading edge so as to oppose both side faces of the magnetic pole part and a bottom shield part magnetically connected to the pair of side shield parts and positioned below the leading edge of the magnetic pole part is provided on the leading edge side in the track width direction of the magnetic pole part of the main magnetic pole layer.

Abstract: A perpendicular magnetic recording head includes a main magnetic pole layer and an auxiliary yoke layer that overlaps the main magnetic pole layer as viewed in a top view and is magnetically coupled to the main magnetic pole layer. The main magnetic pole layer includes a pole straight part exposed to an opposing surface opposite a recording medium, and a flared part that extends from the pole straight part in a height direction, the flared part broadening in a track width direction as the flared part extends in the height direction. The auxiliary yoke layer includes a flared part that extends from the recording medium-opposing surface, the flared part broadening in the track width direction as the flared part extends in the height direction. The flared part of the auxiliary yoke layer is disposed at a position located closer to the rear side in the height direction than the flared part of the main magnetic pole layer.

Abstract: Embodiments in accordance with the present invention provide a perpendicular recording magnetic head whose dimensional dependency on the nonuniformity of magnetic field strength and distribution during manufacture is minimized, with narrowed tracks and without attenuation or erasure of adjacent track data while maintaining high magnetic field strength. According to one embodiment, a magnetic material (trailing/side shield) for creating a steep gradient of magnetic field strength is provided at a trailing side of a pole tip of a main magnetic pole piece and in a direction of the track width. The magnetic head is formed so that a gap (side gap length “gl”) between a side shield and a throat height portion of the pole tip progressively decreases with an increasing distance from an air-bearing surface, in a direction of an element height.

Abstract: The method and system for providing a perpendicular magnetic recording (PMR) head are described. The PMR head includes a base layer, a nonmagnetic metal underlayer on the base layer, and a PMR pole on the nonmagnetic metal underlayer. The PMR pole has a top that is wider than its bottom. The base layer has a first hardness with respect to a pole trim. The nonmagnetic metal underlayer has a second hardness with respect to the pole trim. The second hardness is less than the first hardness.

Abstract: A perpendicular magnetic recording (PMR) head is fabricated with a pole tip shielded laterally by a separated pair of side shields and shielded from above by an upper shield. The side shields are formed by a RIE process using specific gases applied to a shield layer through a masking layer formed of material that has a slower etch rate than the shield material. A masking layer of Ta, Ru/Ta, TaN or Ti, formed on a shield layer of NiFe and using RIE gases of CH3OH, CO or NH3 or their combinations, produces the desired result. The differential in etch rates maintains the opening dimension within the mask and allows the formation of a wedge-shaped trench within the shield layer that separates the layer into two shields. The pole tip is then plated within the trench and, being aligned by the trench, acquires the wedge-shaped cross-section of the trench. An upper shield is then formed above the side shields and pole.

Abstract: In the magnetic recording apparatus, a recording layer is formed in a concavo-convex pattern, and recording elements are formed of convex portions of the concavo-convex pattern. Furthermore, the following equation (I) BL?ERL?BL+2×GL??(Equation (I)) is satisfied in each of tracks, where BL represents a length of the recording element in a circumferential direction, GL represents a length of a gap between the recording elements in the circumferential direction, and ERL represents an effective recording length which is a length of an effective recording area ER in the circumferential direction, the effective recording area ER being created on a magnetic recording medium by a heating head and a recording head.

Abstract: Embodiments in accordance with the present invention provide a magnetic head in which broadening of the write-field distribution in the track-width direction can be decreased without reducing the write-field intensity. A main pole includes a pole tip having a part which provides the write track-width and a yoke part recessed from the air bearing surface in the element height direction, the pole tip including at least two magnetic films having different track-width directions, and the throat height at the trailing side being made smaller than the throat height at the leading side.

Abstract: A perpendicular magnetic recording head includes a nonmagnetic insulating layer and a main magnetic pole layer disposed on the nonmagnetic insulating layer. The main magnetic pole layer includes a pole straight part exposed in an opposing surface opposite a recording medium and a flared part that extends from the pole straight part in a height direction. The flared part broadens in a track width direction as the flared part extends in the height direction. The pole straight part of the main magnetic pole layer as viewed from the opposing surface has a trapezoidal shape over its entire length, the trapezoidal shape being narrowed at the nonmagnetic insulating layer-side. The flared part as viewed from the opposing surface has a trapezoidal shape at least at a junction with the pole straight part, the trapezoidal shape being narrowed at the nonmagnetic insulating layer-side.

Abstract: A perpendicular magnetic write head having a conformal wrap around trailing shield. The write head includes a write pole that can be configured with a trapezoidal shape as viewed from the Air Bearing Surface (ABS) and which includes a wrap around trailing magnetic shield. The magnetic shield has a trailing portion that is separated from the leading edge of the write pole by a non-magnetic trailing gap, and has side shield portions that are separated from first and second side portions of the write pole by first and second non-magnetic side gaps. The magnetic shield can be configured with notches at either side of the trailing portion of magnetic shield. These notches can extend in the trailing direction by a distance that is preferably ¼ to 1 times the trailing gap thickness. The width of the straight, trailing portion of the shield is preferable ½ to 1 times of the main pole width.

Abstract: The present invention relates to a perpendicular recording magnetic head. A main magnetic pole film of a perpendicular recording element is a plated film formed on an electrode film and having a small width portion and a large width portion. The small width portion is a portion for emitting a perpendicular magnetic field from a front end thereof, while the large width portion is portion being continuous with a rear end of the small width portion and having an increased width. The electrode film is different in film thickness between beneath a portion of the plated film forming at least the front end of the small width portion and beneath a portion of the plated film forming the large width portion.

Abstract: Embodiments in accordance with the present invention provide a magnetic head in which broadening of the effective track width can be decreased without reducing the write-field intensity and a variation of the track width can be decreased. A main pole consists of a pole tip having a part which provides the write track-width and a yoke part recessed from the air beating surface in the element height direction, and the pole tip consists of a pole tip at the trailing side where the width in the track-width direction is large and a pole tip at the leading side where the width in the track width direction is small. Moreover, the throat height of the pole tip at the trailing side is made greater than the throat height of the pole tip at the leading side.

Abstract: The present invention is a truncated probe for a perpendicular recording write head. The truncated probe is formed in a resist using a pullback process. In the pullback process, a trench is formed in the resist. The resist is then heated to a required temperature for a predetermined duration of time. By controlling the temperature and time, the amount of pullback of the resist is controlled to form a specified angle for the truncated probe. Further, the present invention increases the efficiency of the write head by reducing the distance between the air-bearing surface (ABS) and a magnetic back gap of the perpendicular recording write head yokes. This reduction reduces the length of the write head and permits a faster rise time of a recorded signal.

Abstract: If the length of a track-defining section from an air bearing surface varies due to tolerance during a head manufacturing process, the recording magnetic field changes, which involves the variation of the track width to be recorded on the medium. In accordance with an embodiment of the present invention, the main magnetic pole of a magnetic head includes a track-defining section shaped in trapezoid and a magnetic flux guiding section formed in trapezoid, as viewed from above. The track-defining section is formed such that its width parallel to the air bearing surface (ABS) increases at the rate of 10 to 20% with respect to its height-direction length. The rate of 10 to 20% is a range in which the shape is properly controllable taking into account the variations resulting from the tolerance of the head manufacturing process.

Abstract: There is a thin-film magnetic head provided, which comprises a perpendicular recording head portion including a thin-film coil adapted to generate a magnetic flux, and a main magnetic pole layer that extends rearward from a recording medium opposite plane facing a recording medium and has a main magnetic pole adapted to release a magnetic flux produced at the thin-film coil toward the recording medium. A given concave groove form that is more constricted as the lower end draws nearer is provided at or near the flare point of the front end of the main magnetic pole, so that the flow of the magnetic flux through the main magnetic pole is focused on the upper end edge (gap portion), thereby improving overwrite performance and holding back the occurrence of pole erasure.

Abstract: A thin-film magnetic head has a laminated construction comprising a main pole layer having a magnetic pole tip on the side of the medium-opposing surface opposing a recording medium, a write shield layer opposite the magnetic pole tip forming a recording gap layer, on the side of the medium-opposing surface, and a thin-film coil wound around at least a portion of the write shield layer. The main pole layer has the magnetic pole tip with a shortened structure which is not connected to the write shield layer, and an upper yoke pole section and/or lower yoke pole section with a larger size than the magnetic pole tip, and has a joined structure wherein the upper yoke pole section and/or lower yoke pole section is joined to the magnetic pole tip.

Abstract: Embodiments of the invention provide a thin film magnetic recording head that can reduce the round portion of the track restriction part of the main pole and has excellent track width accuracy, as well as its fabrication method. In one embodiment, the main pole is etched in the following three processes. (1) An ion beam is injected into the substrate at an angle of about 50°±20° while vibrating the substrate horizontally within a range of about ±(30° to 150°) in a reference direction in which the ion beam is oriented from the medium to the air bearing surface. (2) The ion beam is injected into the substrate at an angle of about 60°±20° while vibrating the substrate around a predetermined angle of about 90° to 135° from a direction in which the ion beam is oriented from the medium to the air bearing surface.

Abstract: A magnetic head includes an encasing layer made of a nonmagnetic material and having a groove that opens in the top surface; a nonmagnetic metal layer made of a nonmagnetic metal material, disposed on the top surface of the encasing layer, and having a penetrating opening that is contiguous to the groove; and a pole layer made of a magnetic metal material and encased in the groove of the encasing layer and in the opening of the nonmagnetic metal layer. The pole layer has an end face located in a medium facing surface, the end face having a first portion and a second portion that is located farther from a substrate than the first portion and connected to the first portion. The first portion has a width that decreases as the distance from the substrate decreases. The second portion has a uniform width that defines the track width. In the medium facing surface, the nonmagnetic metal layer exists on both sides of the second portion, the sides being opposed to each other in the direction of track width.

Abstract: A thin-film magnetic head structure has a configuration adapted to manufacture a thin-film magnetic head configured such that a main magnetic pole layer including a magnetic pole end part on a side of a medium-opposing surface opposing a recording medium, a write shield layer opposing the magnetic pole end part so as to form a recording gap layer on the medium-opposing surface side, and a thin-film coil wound about the write shield layer or main magnetic pole layer are laminated. The main magnetic pole layer includes a base magnetic pole part comprising the magnetic pole end part and a base depression distanced farther from the medium-opposing surface than the magnetic pole end part, and an embedded magnetic pole part buried in the base depression and joined to the base magnetic pole part.

Abstract: A pole-layer-encasing layer made of a nonmagnetic material is disposed on an underlying layer made of a nonmagnetic conductive material. The encasing layer has a groove that penetrates. A pole layer is disposed in the groove. The pole layer is formed by plating through feeding a current to the underlying layer. A polishing stopper layer made of a nonmagnetic conductive material is disposed on the top surface of the encasing layer. The polishing stopper layer indicates the level at which polishing for controlling the thickness of the pole layer is stopped. The polishing stopper layer has an opening that penetrates, and the edge of the opening is located directly above the edge of the groove located in the top surface of the encasing layer.

Abstract: There is a thin-film magnetic head provided, which comprises a perpendicular recording head portion including a thin-film coil adapted to generate a magnetic flux, and a main magnetic pole layer that extends rearward from a recording medium opposite plane facing a recording medium and has a main magnetic pole adapted to release a magnetic flux produced at the thin-film coil toward the recording medium. A given concave groove form that is more constricted as the lower end draws nearer is provided at or near the flare point of the front end of the main magnetic pole, so that the flow of the magnetic flux through the main magnetic pole is focused on the upper end edge (gap portion), thereby improving overwrite performance and holding back the occurrence of pole erasure.