Abstract: A method of manufacturing a laminated steel plate capable of simplifying the manufacturing process. This is achieved by a method of manufacturing a laminated steel plate including a step of applying a mixture containing an oil and an adhesive composition for a laminated steel plate including at least one kind of a (meth)acrylate compound compatible with the oil and an organic peroxide to one side or both sides of a strip-like steel plate; and a step of punching a steel plate body from the strip-like steel plate with a punch portion of a press forming device, and laminating and bonding the steel plate bodies.

Abstract: A deposition method includes depositing an adhesive layer on a workpiece to be processed and depositing a magnetic/isolated unit, where the magnetic/isolation unit includes at least one pair of a magnetic film layer and an isolation layer that are alternately disposed. The deposition method of the magnetic thin film laminated structure, the magnetic thin film laminated structure and the micro-inductive device provided by the disclosure can increase a total thickness of the magnetic thin film laminated structure, thereby broadening the application frequency range of the inductive device fabricated thereby.

Abstract: Certain embodiments are directed to a spin torque oscillator (STO) device in a microwave assisted magnetic recording (MAMR) device. The magnetic recording head includes a seed layer, a spin polarization layer over the seed layer, a spacer layer over the spin polarization layer, and a field generation layer is over the spacer layer. In one embodiment, the seed layer comprises a tantalum alloy layer. In another embodiment, the seed layer comprises a template layer and a damping reduction layer over the template layer. In yet another embodiment, the seed layer comprises a texture reset layer, a template layer on the texture reset layer, and a damping reduction layer on the template layer.

Abstract: A printed circuit board includes an insulating material and a circuit, formed on a surface of the insulating material. The circuit comprises a seed layer formed on the surface of the insulating material, an anti-reflection layer formed on the seed layer, and an electroplating layer formed on the anti-reflection layer.

Abstract: A novel apparatus for bonding of two polished substrates includes a plasma source in a ultra-high vacuum (UHV) chamber and a wafer-guiding element to control and guide wafers in the UHV chamber, where after a plasma activation process the wafers are guided and pressed against each other to form a covalent bond between wafer surfaces. The plasma activation process involves deposition of mono-layer or sub-monolayer metallic atom on the surface of substrates. After deposition of metallic layers, a high-force actuation presses the wafers and forms a covalent bond between the wafers. Then, the bonded wafer pair is ion-sliced or thinned to form single crystalline optical thin film. An annealing process oxidizes the deposited metallic layers and produces optically-transparent single crystalline thin film. An optical waveguide may be fabricated by this thin film while utilizing an electro-optic effect to produce optical modulators and other photonic devices.

Abstract: Provided is a reactor in which it is possible to reduce molding failures in inner resin portions when molding the inner resin portions. A reactor includes: a coil having winding portions; and a magnetic core having inner core portions and outer core portions. The reactor further includes: inner resin portions that fill gaps between the winding portions and the inner core portions; and inner interposed members that are interposed between the winding portions and the inner core portions, and form resin flow paths. The inner interposed members have spacers arranged between the winding portions and the inner core portions. The spacers are provided with air discharge paths that are in communication with the resin flow paths, and extend in the axial direction of the winding portions to at least one end face side of the winding portions.

Abstract: In one general embodiment, a method includes forming a slot on a tape bearing surface of at least a chip having a thin film layer with a plurality of transducers therein, the slot defining a skiving edge. A second operation is performed on the tape bearing surface of at least the chip for removing a portion of the chip positioned on an opposite side of the slot as the transducers.

Abstract: A device that includes a near field transducer (NFT); at least one cladding layer adjacent the NFT; and a carbon interlayer positioned between the NFT and the at least one cladding layer.

Abstract: A magnetic device according to one embodiment includes a source of flux and a magnetic yoke coupled to the source of flux. The source of flux includes a thin film coil having multiple turns. The magnetic yoke has a pole with two or more gaps, wherein the coil turns have a non-uniform placement in the magnetic yoke for creating a higher magnetic field at one of the gaps than another of the gaps during writing. A magnetic device according to another embodiment includes a source of flux. A geometry of the magnetic pole near or at one of the gaps is different than a geometry of the magnetic pole near or at another of the gaps to help equalize fields formed at the gaps when the source of flux is generating flux.

Abstract: Depositing a seed layer for a high-moment shield onto a write pole may have a deleterious effect on the magnetic response of the write pole. Instead, an amorphous separation layer may be deposited between the write pole and the seed layer. In one embodiment, the seed layer is formed directly on the amorphous layer. In addition to separating the seed layer from the write pole, the amorphous separation layer permits the seed layer to dictate the crystallographic orientation of the shield which is subsequently deposited on the magnetic head. That is, the amorphous layer provides a substrate that allows the seed layer to have a crystalline structure independent of the layers that were deposited previously. The amorphous separation layer may comprise an amorphous metal—e.g., NiNb or NiTa—or an insulative material—e.g., alumina or silicon dioxide.

Abstract: An apparatus comprises a writer, a near-field transducer (NFT), a channel waveguide proximate the NFT, a dielectric layer between the NFT and waveguide, and a plurality of heat sinks. A first heat sink comprises a gap and contacts the NFT and the writer. A second heat sink extends across the gap of the first heat sink and between the NFT and a heat reservoir component, such as a return pole of the writer. The channel waveguide may contact the second heat sink, such as by encompassing a peripheral portion of the second heat sink. The second heat sink may have at least an outer surface comprising a plasmonic material, and may be configured to enhance plasmonic excitation of the NFT.

Abstract: A magnetic device according to one embodiment includes a source of flux; a magnetic pole having two or more gaps; and a low reluctance path positioned towards at least one of the gaps and riot positioned towards at least one other of the gaps for affecting a magnetic field formed at the at least one of the gaps when the source of flux is generating flux. Other disclosed embodiments include devices having coil turns with a non-uniform placement in the magnetic yoke for altering a magnetic field formed at the at least one of the gaps during writing. In further embodiments, a geometry of the magnetic pole near or at one of the gaps is different than a geometry of the magnetic pole near or at another of the gaps to help equalize fields formed at the gaps when the source of flux is generating flux.

Abstract: An apparatus comprises a slider of a magnetic recording head having an air bearing surface (ABS), a write pole terminating at or near the ABS, and a near-field transducer (NFT) adjacent the write pole. A light delivery arrangement extends through the slider and terminates at the ABS. The light delivery arrangement is configured to communicate light through the slider and to the NFT. A transparent heat sink layer abuts a terminal end portion of the light delivery arrangement and terminates at the ABS. The heat sink layer has a thermal conductivity greater than that of the light delivery arrangement.

Abstract: A magnetic element can be configured with a write pole that continuously extends from an air bearing surface along a plane orthogonal to the air bearing surface. A magnetic shield can be separated from the write pole by a first gap distance on the air bearing surface throughout a tip portion of the write pole and by a second gap distance distal the air bearing surface along the plane orthogonal to the air bearing surface along a body portion of the write pole with the first and second gap distances measured parallel to the air bearing surface and the second gap distance being greater than the first gap distance.

Abstract: A semiconductor device includes: a semiconductor-element substrate in which a front-surface electrode pattern is formed on a surface of an insulating substrate and a back-surface electrode is formed on another surface; semiconductor elements affixed to the surface of the front-surface electrode pattern opposite the insulating substrate; and a sealing resin member which covers the semiconductor element and the semiconductor-element substrate, wherein at a position of the front-surface electrode pattern where the position has potential equivalent to that of the front-surface electrode pattern at a position where a semiconductor element is bonded, an insulating terminal table formed with a conductive relay terminal and an insulating member that insulates the relay terminal and the front-surface electrode pattern from each other are provided, and wiring from the semiconductor element to the outside is led out via the relay terminal.

Abstract: The present invention generally relates to a write head pole laminate structure. The write head pole structure can include multiple multi-layer magnetic structures that are separated by a non-magnetic material that is amorphous or microcrystalline. Each multi-layer magnetic structure includes one or more first magnetic layers that are spaced from one or more second magnetic layers by a non-magnetic layer such that the one or more first magnetic layers are substantially identical to the one or more second magnetic layers. In such a design, the one or more second magnetic layers are antiparallel to the one or more first magnetic layers so that a zero total net magnetic moment is present for the multi-layer magnetic structure when current is removed from the write head pole.

Abstract: A magnetic write head for magnetic data recording that has a magnetic write pole and a magnetic side shield structure, wherein the flare angle and bevel angle of the write pole are different from the flare angle and bevel angle of the magnetic side shield structure. The magnetic side shield has a flare angle that is greater than that of the write pole, and has a bevel angle that is smaller than that of the write pole. This advantageously provides a strong write field, while also preventing adjacent track and far track interference. The write head can include a bi-layer non-magnetic side gap structure, wherein one layer of the bi-layer side gap structure has a uniform thickness and the other layer has a non-uniform thickness.

Abstract: A write pole structure disclosed herein includes a write pole layer, a bottom layer including a beveled surface, and a cap layer between the write pole layer and the bottom layer, wherein the cap layer is made of a material with hardness less than hardness of the write pole layer.

Abstract: A magnetic disk drive system configured for shingled magnetic data recording wherein data tracks are recorded in an overlapping fashion on a magnetic media. The disk drive system includes magnetic write heads that are asymmetric so as to have increased writing at one side of the write head. The magnetic disk drive system includes magnetic write heads that are mirror images of one another so that write heads located at opposite surfaces of the magnetic media (e.g. one head facing up and one facing down) end up having preferential writing in the location relative to inner and outer diameters of the magnetic media.

Abstract: The present invention generally relates to a magnetic recording system that utilizes perpendicular exchange spring media and ring heads. The write field of ring heads does not experience a strong loss as compared to pole heads because the pole can be kept long in the direction perpendicular to the recording medium and thus does not result in unfavorable write field scaling.

Abstract: A method of depositing material onto a base portion of a wafer is disclosed. The method includes forming a bevel into a portion of a surface of the base portion of the wafer and depositing a first layer of conductive material onto the beveled portion of the base portion so that part of the first layer includes a wedge shape above the surface of the base portion. A second layer of conductive material is deposited onto the base portion including the portion of the base portion onto which the first layer of material is deposited.

Abstract: A multilayer film includes a magnetic film and a non-magnetic film. The magnetic film and the non-magnetic film are alternately stacked. The magnetic film contains Fe, Ni and P but has Fe or Ni as a main component. The non-magnetic film contains Fe, Ni and P but has Ni as a main component.

Abstract: Embodiments of the present invention provide a magnetic head for perpendicular magnetic recording, and a magnetic disk apparatus capable of preventing data erasure caused by alignment marks. In an embodiment, the magnetic head includes a head element including at least a main pole having a pole face on a flying surface and an auxiliary pole; alignment marks made of a magnetic material and used to detect the amount of lapping work when lapping the pole face of the main pole; and members made of a magnetic material, continuously extending in either direction with respect to the position of the main pole from within the alignment marks outward at least beyond the alignment marks.

Abstract: According to one embodiment, a magnetic recording head manufacturing method includes forming a spin torque oscillator layer on a main magnetic pole layer, forming a mask on the spin torque oscillator layer, processing the spin torque oscillator layer by performing ion beam etching through the mask, and partially modifying the main magnetic pole layer through the mask. The partially modifying the main magnetic pole layer makes it possible to decrease the saturation flux density of the main magnetic pole layer in the modified portion, and form an unmodified main magnetic pole portion covered with the mask, and a modified portion around the main magnetic pole.

Abstract: A method and system plates CoFeX, where X is an insertion metal. The method and system include providing a plating solution including hydroxymethyl-p-tolylsulfone (HPT). The plating solution being configured to provide a CoFeX film having a high saturation magnetic flux density of greater than 2.3 Tesla and not more than 3 weight percent of X. The method and system also include plating the CoFeX film on a substrate in the plating solution. In some aspects, the plated CoFeX film may be used in structures such as main poles of a magnetic recording head.

Abstract: To suppress a spread of not only a recording magnetic field generated from a main pole but also a high-frequency magnetic field generated from a spin torque oscillator in a microwave assisted magnetic recording head. The main pole and the spin torque oscillator are surrounded by a trailing shield layer and are also surrounded by a side/leading shield layer with an insulator sidegap layer interposed therebetween, and a high-frequency magnetic field shield layer, which absorbs a high-frequency magnetic field generated from the spin torque oscillator, is arranged in at least part of the shield layers.

Abstract: A magnetic layered structure is presently disclosed comprising a pinned layer, a first anti-ferromagnetic layer that defines a magnetic orientation of the pinned layer, a free layer, a second anti-ferromagnetic layer that biases the free layer to a magnetic orientation approximately perpendicular to the magnetic orientation of the pinned layer, and a tuning layer positioned between and in contact with the second anti-ferromagnetic layer and the free layer that tunes free layer bias to a desired level.

Abstract: A magnetic structure includes a first magnetic layer, a nonmagnetic insulating layer, a nonmagnetic adhesion layer disposed on the top surfaces of the first magnetic layer and the nonmagnetic insulating layer, and a second magnetic layer disposed on the nonmagnetic adhesion layer. The nonmagnetic insulating layer contains an oxygen atom. The nonmagnetic adhesion layer is composed of one element or a plurality of elements selected from the group consisting of Al, Si and nonmagnetic transition metal elements except Ru, and the bond enthalpy of a diatomic molecule composed of an atom of the one element or each of the plurality of elements and an oxygen atom is 400 kJ/mol or higher. The nonmagnetic adhesion layer has a thickness within a range of 0.3 to 0.8 nm. The first magnetic layer and the second magnetic layer are ferromagnetically coupled to each other.

Abstract: A system comprises a first tapered core configured for positioning adjacent a first surface of a magnetic medium, and a second tapered core configured for positioning adjacent a second surface of the magnetic medium, opposite the first tapered core along a travel direction of the magnetic medium. Each of the first and second tapered cores has a transverse width defined with respect to the magnetic medium, where the transverse width decreases from a first end of the tapered core to a second end of the tapered core, the second end forming a pole face adjacent the magnetic medium.

Abstract: A spin torque oscillator generates a strong high-frequency magnetic field stably and has high reliability. A magnetic recording head includes a main magnetic pole and a spin torque oscillator. A magnetization control layer is antiferromagnetically coupled via a non-magnetic coupling layer with an interface contacting a high-frequency magnetic field generation layer of the spin torque oscillator.

Abstract: In a method of forming a main pole, an initial accommodation layer is etched by RIE using a first etching mask having a first opening, whereby a groove is formed in the initial accommodation layer. Next, a part of the initial accommodation layer including the groove is etched by RIE using a second etching mask having a second opening, so that the groove becomes an accommodation part. The main pole is then formed in the accommodation part. The first etching mask has first and second sidewalls that face the first opening and are opposed to each other at a first distance in a track width direction. The second etching mask has third and fourth sidewalls that face the second opening and are opposed to each other at a second distance greater than the first distance.

Abstract: An apparatus includes a waveguide having a core layer and an end adjacent to an air bearing surface, first and second poles magnetically coupled to each other and positioned on opposite sides of the waveguide, wherein the first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion toward the air bearing surface, with the second portion being structured such that an end of the second portion is closer to the core layer of the waveguide than the first portion, and a heat sink positioned adjacent to the second portion of the first pole.

Abstract: A method and system for providing a magnetic recording transducer having a pole are disclosed. The pole has side(s), a bottom, and a top wider than the bottom. The method and system include providing at least one side gap layer that covers the side(s) and the top of the pole. At least one sacrificial layer is provided on the side gap layer(s). The sacrificial layer(s) are wet etchable and cover the side gap layer(s). The magnetic recording transducer is planarized after the sacrificial layer(s) are provided. Thus, a portion of the side gap and sacrificial layer(s) is removed. A remaining portion of the sacrificial layer(s) is thus left. The method and system also include wet etching the sacrificial layer(s) to remove the remaining portion of the sacrificial layer(s). A wrap around shield is provided after the remaining portion of the sacrificial layer(s) is removed.

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: In high frequency magnetic assisted recording technique, a spin torque oscillator that stably oscillates at a low current and a magnetic recording head with high recording density are provided. In a magnetic recording head including an oscillator that generates a high frequency magnetic field, a spin injection layer structure of two laminated magnetic layers which are coupled to be anti-parallel is adopted. A product Ms×t of the saturated magnetization Ms and the film thickness t of the first magnetic layer close to a field generation layer is smaller than a product Ms×t of the second magnetic layer remote from the field generation layer.

Abstract: A system according to one embodiment includes a first portion comprising at least a portion of a coil structure and at least a portion of a magnetic yoke, the first portion being oriented at an angle of greater than 0° and less than 90° relative to a substantially planar portion of an underlying substrate; a first pole; a second pole; and a write gap, a portion of the write gap having a plane of deposition oriented about perpendicular to a final media-facing surface of the write gap.

Abstract: A method of fabricating a recording head includes depositing an insulator material onto at least a portion of a first member, wherein the insulator material forms an insulator film having a film thickness. The method further includes depositing a writer pole material onto the insulator film, wherein the writer pole material forms a writer pole member, and wherein the insulator film is between the writer pole member and a contact layer. Further, in some embodiments, the film thickness determines the distance between the writer pole member and the first contact member and also determines the distance between the writer pole member and the second contact member.

Abstract: A write pole can have a magnetically conductive pole tip has at least one corner. The at least one corner may be chamfered to limit magnetic saturation of the conductive pole tip. The conductive pole tip can have one or more beveled surface that has a chamfered corner which extends a predetermined distance along an edge of the write pole.

Abstract: A selectively magnetic insert that is capable of enhancing magnetic writing, such as in use as a data transducing head. In accordance with various embodiments, a write pole is in contact with a selectively magnetic insert that decouples the write pole from at least one adjacent shield in response a powered operation.

Abstract: A laminated high moment film with a non-AFC configuration is disclosed that can serve as a seed layer for a main pole layer or as the main pole layer itself in a PMR writer. The laminated film includes a plurality of (B/M) stacks where B is an alignment layer and M is a high moment layer. Adjacent (B/M) stacks are separated by an amorphous layer that breaks the magnetic coupling between adjacent high moment layers and reduces remanence in a hard axis direction while maintaining a high magnetic moment and achieving low values for Hch, Hce, and Hk. The amorphous material layer may be made of an oxide, nitride, or oxynitride of one or more of Hf, Zr, Ta, Al, Mg, Zn, Ti, Cr, Nb, or Si, or may be Hf, Zr, Ta, Nb, CoFeB, CoB, FeB, or CoZrNb. Alignment layers are FCC soft ferromagnetic materials or non-magnetic FCC materials.

Abstract: According to one embodiment, a magnetic disk drive includes a magnetic disk to be subjected to perpendicular recording, a first pole core including a main pole configured to record signals on the magnetic disk, a first coil wound around the first pole core, a second pole core magnetically independent of the first pole core, tip ends of which are arranged on both sides of the main pole, a second coil wound around the second pole core, a read unit including an element configured to read data recorded on the magnetic disk, and a correction unit configured to correct a current phase difference between the first and second coils.

Abstract: A method for manufacturing a magnetic write head having a write pole with a tapered, stepped trailing edge. The method includes depositing a magnetic write pole material over a substrate, and then forming a magnetic step structure over the magnetic write pole material. A mask structure is then formed, which includes a multilayer hard mask formed over the magnetic write pole material and the magnetic step structure. An ion milling process is then performed to remove a portion of the write pole material to define a write pole. A non-magnetic material can be deposited and ion milling performed to form non-magnetic side gap layer at the sides of the write pole. A multi-step reactive ion milling process can then be performed to remove the remaining hard mask from over the write pole.

Abstract: A magnetic head includes a pole layer, first and second side shields, and an encasing layer having first to third grooves that accommodate the pole layer and the first and second side shields. A manufacturing method for the magnetic head includes the step of forming the first to third grooves in a nonmagnetic layer by using an etching mask layer having first to third openings. This step includes the steps of forming the first groove by etching the nonmagnetic layer using the first opening, with the second and third openings covered with a first mask; and forming the second and third grooves by etching the nonmagnetic layer using the second and third openings, with the first opening covered with a second mask.

Abstract: A compact magnetic recording head is provided. The recording head includes a write pole and a substantially planar yoke, which is coupled to the write pole. The yoke is configured to support a substantially single vortex configuration of magnetization.

Abstract: Data storage systems having barriers that may reduce erasure flux and increase write-ability are provided. Data storage systems include a writing element. The writing element has a write pole with a flare region. A magnetic flux barrier is located along the write pole flare region. The magnetic flux barrier is illustratively made from an in-plane magnetically anisotropic material that has an easy plane of magnetization. In another embodiment, a data storage system includes a writing element having an air bearing surface and a shield at the air bearing surface. The shield has a magnetic permeability of approximately zero. The shield illustratively includes alternating layers of positive and negative permeabilities. The shield optionally includes a plurality of shields that may include top, bottom, and side shields.

Abstract: A magnetic recording and reading device, free from coil windings, includes a naturally magnetic material that defines a pair of opposite magnetic poles and defines a magnetic field. A conductor in operable association with an integrated circuit array provided at each of the magnetic poles controls direction and flow of current in the conductors.

Abstract: In a perpendicular magnetic write head manufacturing method a magnetic layer is formed on a substrate. On the magnetic layer, first and second nonmagnetic layers are formed with different materials. A mask pattern is formed on the second nonmagnetic layer, and the second nonmagnetic layer in a region not covered with the mask pattern is removed. Thereby, the patterned second nonmagnetic layer is formed while leaving the first nonmagnetic layer. The mask pattern is removed and a milling process is selectively performed on the first nonmagnetic layer and the magnetic layer with the patterned second nonmagnetic layer as a mask to remove all of the first nonmagnetic layer in an exposed region and to dig down the magnetic layer in the exposed region, thereby forming a main magnetic pole layer having an inclined part whose thickness decreases with distance from an edge position of the patterned second nonmagnetic layer.

Abstract: The thin-film magnetic head in accordance with the present invention comprises a magnetic pole, a coil surrounding the magnetic pole, and an insulating layer covering the coil, while the insulating layer is formed from a resin containing a carbon nanotube. Preferably, the resin contains 0.05 to 5 wt % of the carbon nanotube. Preferably, the resin contains a cyclodextrin.

Abstract: Methods are provided for fabricating a write head with a self aligned wrap around shield and a self aligned flared region of a write pole. A flare point and a track width of a write pole may be fabricated using multiple processes. The multiple processes utilize several masking structures to define the track width and the flare point of the write pole. A mask structure is formed to cover a first portion of the write pole. An edge of the mask structure adjacent to an exposed second portion of the write pole defines a flare point of the write pole. Various structures of the write head, including shield gap layers, a wrap around shield and a flared region (e.g., the yoke) of the write pole may be fabricated from the flare point defined by the mask structure.

Abstract: A writer comprises a main pole, a write gap and a write shield. The main pole has a main pole tip for emitting magnetic flux. The write gap is adjacent the main pole tip along a center axis of the writer. The write shield is spaced from the main pole tip by the write gap. The write shield comprises a first component located above the main pole tip along the center axis and a second component having different magnetic properties from the first component. The second component extends perpendicularly to the center axis from opposing sides of the first component.