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| Number | Title | Issue Date |
| 6718622 | Method of forming an assembly of stacked layers In an assembly of layers, a first layer has a recess, a second layer is deposited over the first layer, and a third layer is deposited over the second layer and fills the recess. The material of the third layer is less wear resistant than the second layer. After for... | 04/13/2004 |
| 6710972 | Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the head A magnetic head is composed to diminish disordered writing bits of a recording layer or reading noise caused by a magnetic field generated from an under layer without decreasing a writing magnetic field strength of the magnetic head. The magnetic head includes a wri... | 03/23/2004 |
| 6700738 | Read/write head coil tap having upper and lower portions A thin film read/write head with a high performance inductive write section that incorporates a single layer coil with an improved fabrication method of a center tab of the single layer coil. The center tab is formed before the main body of the single lay... | 03/02/2004 |
| 6700720 | Ultrafast magnetization reversal A scheme for ultrafast magnetization reversal in an in-plane magnetized layer (3) is disclosed. For that, an external magnetic field Hex is applied such that the magnetization M precesses around the external magnetic field Hex and th... | 03/02/2004 |
| 6683750 | Thin film magnetic head comprising insulating layer provided between core and coil An inorganic insulation underlying layer and an organic insulation underlying layer are formed on a lower core layer behind a recording region. Also, a coil layer is formed on the organic insulation underlying layer. Therefore, thewithstand voltage betwee... | 01/27/2004 |
| 6678942 | Thin film magnetic head and method of manufacturing the same A method of manufacturing the same in an accurate and stable manner, in which a magnetic path length of a thin film coil is shortened by decrease a distance between adjacent coil windings of at least one layer thin film coil. On a first magnetic layer 37,... | 01/20/2004 |
| 6678940 | Method of making a thin-film magnetic head A method for making a thin-film magnetic head having a magnetoresistive effect element wherein an insulating layer is formed under an electrode layer of a magnetoresistive effect element with a lower gap layer interposed therebetween. As a result, the dis... | 01/20/2004 |
| 6674610 | Thin film write head with universal coil design In at least one embodiment, a thin film write head having a conductor with a coil structure having a central axis perpendicular to an air bearing surface. The conductor having a first contact centrally located at a first end of the conductor. The conducto... | 01/06/2004 |
| 6671127 | Magnetic recording system with single coil for thermally assisted writing A thermally-assisted magnetic recording (TAMR) write head simultaneously generates heat and a magnetic write field to the recording layer on a magnetic recording disk. The write head is located on the trailing face of a head carrier in a TAMR disk drive a... | 12/30/2003 |
| 6665142 | Thin film magnetic head and method of manufacturing the same An object of the invention is to provide a thin film magnetic head which can exhibit a high-performance head characteristic without complicating the manufacturing procedure, and a method of manufacturing the same. A coil connection is integrated into one ... | 12/16/2003 |
| 6662433 | Method of fabricating the thin film magnetic head A thin film magnetic head includes a lower shielding layer composed of a magnetic material; a nonmagnetic MR gap layer on the lower shielding layer; a magnetoresistive element layer in the MR gap layer facing a recording medium; a lower core layer compose... | 12/16/2003 |
| 6655006 | Method of making a tunnel junction sensor with a smooth interface between a pinned or free layer and a barrier layer A method of making provides a smooth surface of a pinned or free layer interfacing a barrier layer in a tunnel junction sensor wherein the smooth surface is an oxidized monolayer of the pinned or free layer. After sputter depositing the pinned or free lay... | 12/02/2003 |
| 6654202 | Disc drive with layered write coil A disc drive includes a disc and a read/write head accessing the disc. The head includes a thermally conductive substrate and a write coil window surrounded by a shared pole piece thermally coupled to the substrate, a central core, a write pole piece and ... | 11/25/2003 |
| 6651313 | Method for manufacturing a magnetic head In the present method for manufacturing a magnetic write head a focused ion beam (FIB) tool is utilized to mill the side edges of a P2 pole, in order to provide a narrowed track width. Prior to milling, a thin film layer of material is deposited upon the ... | 11/25/2003 |
| 6643094 | Magnetic head device including a guide recess for guiding lead wires A magnetic head device is provided which can guide lead wires without increasing its dimension. A guide recess having a depth of 0.1 to 0.5 mm is formed in an end face of a terminal block, so that the lead wires can pass therethrough for connection to ter... | 11/04/2003 |
| 6628604 | Magnetic head having a magnetic coil A magnetic head suitable for use in a magneto-optical apparatus. The magnetic head has a flat electromagnetic coil (1) with a central opening (3). The coil has parallel coil layers (5a, 5b), each of the coil layers having a turn (5A, 5B) arranged around t... | 09/30/2003 |
| 6621660 | Thin film magnetic head The electroplated components of a magnetic head of the present invention are fabricated utilizing a seed layer that is susceptible to reactive ion etch removal techniques. A preferred seed layer is comprised of tungsten or titanium. Following the electrop... | 09/16/2003 |
| 6603641 | Thin film magnetic head and method of manufacturing the same A bottom pole is divided into a bottom pole tip and a bottom pole layer, and the bottom pole tip is formed on the flat surface of the bottom pole layer. An insulating layer is formed in a concave region adjacent to the bottom pole tip, and the throat heig... | 08/05/2003 |
| 6594122 | GMR head with reduced topology for high speed recording with submicron track width A magnetic recording head having an air bearing surface includes first and second top poles, a bottom pole, a write gap layer positioned between the first top pole and the bottom pole, a first conductive coil positioned between the second top pole and the... | 07/15/2003 |
| 6578252 | Method of manufacturing a thin film magnetic head A method of manufacturing a thin film magnetic head allowing high performance head characteristics to be achieved without complicating manufacturing steps. At the same time an insulating film pattern defining a throat height TH is formed, an insulating fi... | 06/17/2003 |
| 6570739 | Magnetic head having write head element with high aspect ratio coil A hard disk drive of the present invention includes a magnetic head having a high aspect ratio induction coil. The magnetic head includes a first pole tip piece that is formed upon a first magnetic pole and a second pole tip piece that is part of the seco... | 05/27/2003 |
| 6570725 | Drive circuit for magnetic head and winding configuration of magnetic head suitable for the drive circuit The magnetizing control signal MAGCH becomes the high level if there is no magnetic reversal during a period of a predetermined number of clocks and becomes the low level if there is a magnetic reversal. If the magnetizing control signal MAGCH is the low ... | 05/27/2003 |
| 6563674 | Thin-film magnetic head A pair of magnetic heads is provided with a magnetic disk for a magnetic writing/reading apparatus, and a thin-film magnetic head is provided in which forms of leads are easily changed and characteristics are stable. A pair of sliders 3a and 3b oppose eac... | 05/13/2003 |
| 6542331 | Magnetic head having write head with double split yoke The magnetic head of the present invention includes a P1 pole having an opening formed therethrough, and a P2 pole that is formed over the opening. A second magnetic pole tip is positioned relative to the first magnetic pole such that the first magnetic p... | 04/01/2003 |
| 6525905 | Thin film magnetic head having a non-magnetic body and method of manufacturing the same A thin-film magnetic head and a method of manufacturing the same are provided capable of achieving accurate control of a magnetic pole width and sufficient overwrite characteristics even with a reduced magnetic pole width. A first non-magnetic body and a ... | 02/25/2003 |
| 6525901 | Thin film magnetic head and method of manufacturing the same An insulating film, provided above a first yoke portion, supports a thin film coil and has an inclined portion in an air bearing surface side. A second pole portion of a second magnetic film is opposed to a first pole portion via gap film. A second yoke p... | 02/25/2003 |
| 6515826 | Magnetic head induction coil fabrication method utilizing aspect ratio dependent etching A magnetic head including a dual layer induction coil. Following the deposition of a first magnetic pole (P1) a first induction coil is fabricated. Following a chemical mechanical polishing (CMP) step a layer of etchable insulation material is deposited f... | 02/04/2003 |
| 6513228 | Method for forming a perpendicular recording read/write head A method for forming a perpendicular magnetic read/write head having an air bearing surface and comprising a substantially planar top pole and a shared pole is disclosed. The steps include forming a top pole, a shared pole, and a yoke wherein the top pole... | 02/04/2003 |
| 6507456 | Dual coil and lead connections fabricated by image transfer and selective etch A magnetic head including a dual layer induction coil fabricated by reactive ion etching (RIE) techniques. An etch stop layer and an etchable insulation material layer and an induction coil etching mask are fabricated on a first magnetic pole. Induction c... | 01/14/2003 |
| 6507455 | Thin film magnetic head capable of reducing coil resistance value of entire coil layer formed between core layers A thin film magnetic head that reduces the coil resistance of the coil layer formed between core layers is formed by increasing the conductor width at a fixed ratio from the inner to the outer side of the coil layer in the conductor width of each turn. Th... | 01/14/2003 |
| 6496330 | Magnetic write head having a splitcoil structure A magnetoresistive head having a split coil structure including multiple, similar coil layers separated by an insulator and joined at their ends to define parallel electrical paths. The coil passes through a magnetic yoke having an open end and a closed e... | 12/17/2002 |
| 6490128 | Thin-film device with improved cohesion and electrical conductance between electrically conductive thin-film and electrical conductor in contact therewith, and manufacturing method therefor A coil layer as an electrically conductive thin-film of a thin-film device comprises a copper layer as an electrically conductive material layer and a nickel layer as an electrically conductive protective layer composed of a material, in which an oxide la... | 12/03/2002 |
| 6477765 | Method of fabricating a magnetic write transducer What is disclosed is a method of fabricating a thin film magnetic write transducer and the resulting write transducer structure. The method starts with the formation of a bottom pole of the write transducer on a base layer or substrate. This is followed b... | 11/12/2002 |
| 6477004 | Thin film magnetic head In a thin film magnetic head including a first magnetic layer 36, a write gap layer 41 and a second magnetic layer 42, 47 formed on a substrate 31, 32 and one or more thin film coil layers provided between the first and second magnetic layers, in order to... | 11/05/2002 |
| 6466401 | Thin film write head with interlaced coil winding and method of fabrication The preferred embodiment of the present invention provides a write head having an interlaced conductor coil winding and method of fabrication. The interlaced winding of the present invention may have alternating turns of a first and a second coil. In the ... | 10/15/2002 |
| 6459542 | Thin film magnetic head having the coil layer patterned directly on an insulating layer on a lower core layer and its manufacturing method A coil layer is patterned directly on an insulation layer formed on a lower core layer. This can decrease the height dimension from the top of a top pole layer to the top of a coil insulation layer as compared with a conventional example, thereby permitti... | 10/01/2002 |
| 6452742 | Thin film write having reduced resistance conductor coil partially recessed within middle coat insulation In a preferred embodiment, a thin film write head having upper and lower pole structures. In the preferred embodiment of the present invention, a middle coat insulation layer is located over a yoke of the lower pole structure and adjacent a pedestal pole ... | 09/17/2002 |
| 6452740 | Multi-stage thermoelectric microcoolers for cooling write coils and GMR sensors in magnetic heads for disk drives An improved read/write head for use in computer hard drives is provided. In one embodiment, the read/write head includes first and second thermally conducting plates and a first and second stage of microcoolers. The second thermally conducting plate is th... | 09/17/2002 |
| 6441994 | High frequency response writer with recessed shared pole and vertical coils A magnetic recording head has a top pole, a write gap layer, a shared pole, and conductive coils. The shared pole has an air bearing surface, a top surface substantially normal to the air bearing surface, and a recess in the top surface extending across t... | 08/27/2002 |
| 6433960 | Method of manufacturing a magnetic head A thin film magnetic head having a short magnetic path length by reducing a spacing between successive coil windings of a thin film coil to improve flux rising time, NLTS and overwrite characteristics, is efficiently manufactured on a mass scale by formin... | 08/13/2002 |
