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| Number | Title | Issue Date |
| 7359148 | Thin film magnetic head including NiPRe alloy gap layer It is an object to provide a thin film magnetic head capable of improving characteristics and properties required of a gap layer by, in particular, appropriately controlling the compositional ratio of a NiPRe alloy used as the gap layer. A NiPRe alloy which has exce... | 04/15/2008 |
| 7351484 | High field contrast magnetic stampers/imprinters for contact patterning of magnetic media A high field contrast magnetic stamper/imprinter for use in patterning of magnetic and magneto-optical (MO) recording media by contact printing, comprises: (a) a layer of a magnetic material having a high saturation magnetization B... | 04/01/2008 |
| 7342276 | Method and apparatus utilizing monocrystalline insulator A semiconductor device, including: a semiconductor material; a conductive element; and a substantially monocrystalline insulator disposed between the semiconductor material and the conductive eleme... | 03/11/2008 |
| 7268975 | High data rate writer with low resistance coil and short yoke One of the major requirements for higher frequency extendability is to reduce yoke length and inductance in order to have fast saturation. This has been accomplished by using a design that provides a cavity in the lower pole piece inside which is located at least tw... | 09/11/2007 |
| 7265942 | Inductive magnetic head with non-magnetic seed layer gap structure and method for the fabrication thereof A magnetic head including first and a second magnetic poles with a write gap layer disposed therebetween. In a first embodiment the write gap layer includes a non-magnetic, non-conductive first sublayer which is preferably comprised of Ta or Ti which is deposited up... | 09/04/2007 |
| 7251102 | ABS through aggressive stitching Aggressive (i.e. tight tolerance) stitching offers several advantages for magnetic write heads but at the cost of some losses during pole trimming. This problem has been overcome by replacing the alumina filler layer, that is used to protect the stitched pole during... | 07/31/2007 |
| 7248431 | Method of fabricating a perpendicular recording write head having a gap with two portions A method of fabricating a write head for perpendicular recording is provided. The write head has a pole, a shield in proximity to the pole, and a gap between the pole and the shield. The method includes forming a pole layer on an undercoat layer, forming a mask over... | 07/24/2007 |
| 7230793 | Magnetic recording head with anisotropic medium placed between poles A magnetic recording head includes a head body having an end divided into two parts, the two parts facing each other with a predetermined distance therebetween, first and second poles that are disposed on the two parts of the head body, respectively, to form a magne... | 06/12/2007 |
| 7215511 | Magnetic write head with gap termination less than half distance between pedestal and back gap A magnetic write head having a metal, non-magnetic write gap that extends only partially to the magnetic back gap, the remainder of the distance between the pole tip and the back gap being a magnetic material. The elimination of the seed layer reduces the amount of ... | 05/08/2007 |
| 7150819 | Structure and plating method of thin film magnetic head and magnetic storage apparatus A material for magnetic pole for attaining a writing head generating an intense recording magnetic field, and a structure and a manufacturing method therefor. The thin film magnetic head includes a magnetic pole layer having a plated magnetic layer containing Co, Ni... | 12/19/2006 |
| 7113367 | FeNiRe soft magnetic film and thin film magnetic head using the same for simultaneous adjustment of resistivity and saturated magnetic flux density A soft magnetic film composed of an alloy represented by the formula FeNiRe is used for forming a lower core layer and/or an upper core layer. Since having a high saturated magnetic flux density, a high resistivity, superior corrosion resistance, and a small loss in... | 09/26/2006 |
| 7095585 | Hard disk drive for perpendicular recording with transducer having submicron gap between pole tips An information storage system includes a transducer having a loop of ferromagnetic material with pole tips separated by an nonferromagnetic gap located adjacent to a medium such as a rigid disk. During writing the separation between the pole tips and the media layer... | 08/22/2006 |
| 7092206 | Magnetic head with magnetic layers of differing widths and third pole with reduced thickness A magnetic head includes a magnetic write structure having a first magnetic layer having a first pole, a second magnetic layer having a second pole spaced apart from the first pole, and a third magnetic layer having a third pole contacting the second pole. The third... | 08/15/2006 |
| 7035047 | Magnetic recording heads having thin thermally conductive undercoating A magnetic head having read and write elements is provided according to one embodiment. The head includes a substrate. An undercoating is coupled to the substrate. The undercoating has a preferred thickness of between about 1.5 and 0.5 microns or less in a direction... | 04/25/2006 |
| 7023660 | Localized pole tip heating device for magnetic head for hard disk drive The magnetic head is formed with a narrow pole tip, and a pole tip heating element is fabricated to reduce the pole tip stress and increase its permeability, such that the magnetization switching speed of the pole tip is increased. The heating element is preferably ... | 04/04/2006 |
| 7012783 | Sealing glass for magnetic head, magnetic head, and magnetic recording/reproducing device A magnetic head for a magnetic recording/reproducing device to conform to high-density recording, wherein a metal magnetic film with a high saturation flux density is employed and the mechanical strength of the sealing glass for magnetic heads, is improved thereby a... | 03/14/2006 |
| 7009822 | AMR Sensor with a soft adjacent layer having high magnetization, high resistivity, low intrinsic anisotropy and near zero magnetostriction A high magnetization, high resistivity, low corrosion and near zero magnetostriction soft adjacent layer (SAL) is provided for a magnetoresistive (MR) sensor of a read head. The MR sensor may either be an anisotropic MR (AMR) sensor or a spin valve sensor. In both s... | 03/07/2006 |
| 6975485 | Thin film magnetic recording inductive write head with laminated write gap A thin film inductive write head for magnetic recording has a write gap formed as a lamination of alternating layers of a nonmagnetic gap layer and a ferromagnetic spacer layer. There are N gap layers and N−1 spacer layers, with each pole tip of the write head bei... | 12/13/2005 |
| 6972928 | Isotropic deposition for trench narrowing of features to be created by reactive ion etch processing An isotropic deposition method for trench narrowing of thin film magnetic write head features to be created by reactive ion etching. According to the method, a photolithographically defined photoresist trench is formed over a hardmask and underlying polymer layer as... | 12/06/2005 |
| 6958885 | Insulation layer structure for inductive write heads and method of fabrication A computer disk drive (22) having a write head (52) which includes a coil (38), a photoresist insulation layer (66) formed on the coil (38), and an insulation shell layer (102) which is formed on the photoresist insulation l... | 10/25/2005 |
| 6885526 | Thin film magnetic head comprising SiON film A thin film magnetic head includes a gap layer which may be made of a SiON film to increase Young's modulus E to about 123.3 (GPa) or more. As a result, the gap layer is less pushed from a surface facing a recording medium in the height direction during lapping of t... | 04/26/2005 |
| 6842306 | Magnetic head having highly thermally conductive insulator materials containing cobalt-oxide A magnetic head has highly thermally conductive insulator materials containing cobalt-oxide so that heat can more effectively dissipate from the magnetic head. In one illustrative example, the magnetic head has first and second gap layers and a read sensor disposed ... | 01/11/2005 |
| 6833976 | Thin film magnetic recording inductive write head with laminated write gap A thin film inductive write head for magnetic recording has a write gap formed as a lamination of alternating layers of a nonmagnetic gap layer and a ferromagnetic spacer layer. There are N gap layers and N−1 spacer layers, with each pole tip of the write head bei... | 12/21/2004 |
| 6780524 | In-situ oxidized films for use as gap layers for a spin-valve sensor and methods of manufacture Disclosed is a spin-valve sensor disposed between first and second gap layers and formed of one or more in-situ oxidized films. The improved spin valve sensor helps eliminate electrical shorting between the spin-valve sensor and shield layers. A fabrication method o... | 08/24/2004 |
| 6709767 | In-situ oxidized films for use as cap and gap layers in a spin-valve sensor and methods of manufacture Disclosed is a spin-valve sensor employing one or more in-situ oxidized films as cap and/or gap layers in order to achieve an increased GMR coefficient and improved thermal stability. A fabrication method comprises depositing multilayer metallic films on a wafer in ... | 03/23/2004 |
| 6694604 | Method of making a write head with self-aligned pedestal shaped pole tip which are separated by a zero throat height defining layer A merged magnetic head has a top first pole tip layer and a bottom second pole tip layer which are located entirely between an air bearing surface and a coil layer. A write gap layer separates the pole tip layers from one another at the ABS. A zero throat... | 02/24/2004 |
| 6694603 | Process of forming a magnetic microactuator A process of forming a microactuator for positioning a transducing head over a selected radial track of a rotatable disc in a disc drive system is disclosed. A tub is etched in a substrate, and a bottom coil layer is plated at least partially in the tub. ... | 02/24/2004 |
| 6671126 | Overvoltage protection device An overvoltage protection means is described, with a first electrode (1), with a second electrode (2), with an air breakdown spark gap (3) which is present or which acts between the electrodes (1, 2), and with a housing which holds the electrodes (1, 2), ... | 12/30/2003 |
| 6647613 | Method of making a magnetic write head and in-process head structures A batch fabrication technique is described that increases the manufacturing efficiency of servo write heads and also improves servo pattern definition for fine features, while reducing tape and head wear. Multiple heads are fabricated as a batch from one ... | 11/18/2003 |
| 6631050 | Sealing glass for magnetic head and magnetic head using the same Because of its composition that is liable to be crystallized and therefore has a low strength, a conventional sealing glass for magnetic head has a problem in that in a manufacturing process for manufacturing a magnetic head having a narrow track width an... | 10/07/2003 |
| 6612017 | Method of making a write head with multi-stitched second pole piece A method of making a magnetic head, which has an air bearing surface (ABS), includes forming first and second pole piece layers with the second pole piece layer having a front located second pole tip component and a rear located second pole yoke component... | 09/02/2003 |
| 6600629 | Thin film magnetic head having gap layer made of nip and method of manufacturing the same A gap layer is formed by electroplating NiP using a pulsed current. This can suppress crystallization of Ni due to epitaxial growth near the interface of the gap layer. Therefore, a large amount of nonmagnetic element such as P can be contained, and the v... | 07/29/2003 |
| 6591478 | Method of producing magnetic head The use of a Nd-YAG laser or excimer laser enables easy formation of protrusions on a protecting layer and a portion of an opposite surface near the trailing side end thereof and a thin film element. It is thus possible to avoid direct contact between the... | 07/15/2003 |
| 6588091 | Method of making magnetic head with precisely defined zero throat height A method makes a magnetic head having a top and a bottom, front and rear ends and an air bearing surface (ABS) at the front end, comprising the steps of forming first and second pole piece layers with the first and second pole piece layers separated by a ... | 07/08/2003 |
| 6557242 | Method of making a write head with self-aligned pedestal shaped pole tips that are separated by a zero throat height defining layer A merged magnetic head has a top first pole tip layer and a bottom second pole tip layer which are located entirely between an air bearing surface and a coil layer. A write gap layer separates the pole tip layers from one another at the ABS. A zero throat... | 05/06/2003 |
| 6512655 | Magnetic head with sealing glass composition Provided are a glass such as a sealing glass which contains a rare earth element and crystalline particles, a structure made by sealing with said sealing glass, a magnetic head made by bonding using said sealing glass, and a magnetic recording and reprodu... | 01/28/2003 |
| 6433958 | Magnetic head, method for producing the same, video recording and reproduction apparatus including the magnetic head, and video camera including the magnetic head A magnetic head includes a pair of magnetic core halves; and a nonmagnetic layer provided between the pair of magnetic core halves for combining the pair of magnetic core halves. The pair of magnetic core halves each includes an oxide magnetic base, at le... | 08/13/2002 |
| 6392840 | Planarized side by side design of an inductive writer and single metallic magnetoresistive reader In accordance with the present invention, an interleaved bi-directional magnetic tape head is provided in which the read element, write element, and servo element are formed on a common substrate. Each element has a contact pad area electrically associate... | 05/21/2002 |
| 6329087 | Wafer for magnetic head and magnetic head A wafer includes an insulating layer provided on a wafer substrate and formed of a film composition represented by a formula, Al--N.sub.(1-x) --Ox (wherein 0.05ࣘ×ࣘ0.8). There is provided a wafer for a magnetic head as well as a magnetic head ... | 12/11/2001 |
| 6296955 | High moment and high permeability transducer structures and formation Magnetically permeable, high magnetic saturation, primarily iron NiFe alloys are formed on thin seed layers by sputtering and electroplating. Pole layers a few microns in thickness can be formed of magnetically superlative, primarily iron NiFe alloys in t... | 10/02/2001 |
