Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 8238058 | Magnetic recording head, magnetic head assembly, and magnetic recording apparatus According to one embodiment, a magnetic recording head includes a main magnetic pole, a shield, and a stacked structure body. The shield is provided to oppose the main magnetic pole. The stacked structure body is provided between the main magnetic pole and the shiel... | 08/07/2012 |
| 7969683 | Write first design for a perpendicular thin film head A magnetic head structure for perpendicular recording and reading. The head structure includes a write head portion for writing data to magnetic media via lines of flux oriented substantially perpendicular to a surface of the media facing the write head portion. The... | 06/28/2011 |
| 7961428 | Thin-film magnetic head having magnetic layer with non-magnetic layer therewithin Provided is a thin-film magnetic having improved write characteristics in the high-frequency band. The head comprises an electromagnetic coil element comprising upper and lower magnetic layers, a write gap layer and a write coil layer, and in the electromagnetic coi... | 06/14/2011 |
| 7639450 | Flux shunt structure for reducing return pole corner fields in a perpendicular magnetic recording head A magnetic head for use in a perpendicular recording system having a novel shield structure that provides exceptional magnetic shielding from extraneous magnetic fields such as from a write coil, shaping layer or return pole of the write head. The magnetic head incl... | 12/29/2009 |
| 7492550 | Magnetic recording head and method for high coercivity media, employing concentrated stray magnetic fields In methods and arrangements for concentrating stray magnetic fields, a pair of permanent magnets is employed in combination with a magnetic flux circuit, the permanent magnets in the pair having respective magnetizations that are oriented oppositely to each other. T... | 02/17/2009 |
| 7394620 | Perpendicular magnetic recording head and magnetic disc apparatus A magnetic disc apparatus includes a double layered perpendicular recording medium including a soft magnetic underlayer and a perpendicular recording layer, which are formed on a substrate, and a perpendicular magnetic recording head including a main pole generating... | 07/01/2008 |
| 7372656 | disk drive with side erase control Embodiments of the invention provide a disk drive that is capable of effectively controlling a side erase, which is one of the problems with the use of the perpendicular recording technology. In one embodiment, tracks on a recording medium are formed concentrically ... | 05/13/2008 |
| 7372671 | Disk apparatus A head beam is retained at a front portion of the pivoting arm so as to be rotatable, and is continuously urged by an urging member in the counterclockwise direction. The pivoting arm has a directing rod rotating around a supporting shaft. A slidable projection of t... | 05/13/2008 |
| 7368227 | Method to print photoresist lines with negative sidewalls It is very difficult to produce a negative wall angle from either negative or positive-tone chemically amplified resists, especially by e-beam lithography. This problem has now been overcome by first forming a photoresist pedestal in the conventional way, followed b... | 05/06/2008 |
| 7369360 | Perpendicular recording head having controlled permeability and saturation moment A method and apparatus having magnetic properties. The apparatus includes a main pole and a return pole spaced apart from the main pole. The return includes at least one multilayer block having a plurality of alternating layers of magnetic material and non-magnetic ... | 05/06/2008 |
| 7367112 | Method of fabricating a head for perpendicular magnetic recording with a self-aligning side shield structure A method is provided for fabricating a head for perpendicular recording with self-aligning side shields. The voids where the side shields will be formed are milled into the layer of material for the pole tip to achieve self-alignment. A mask is patterned with openin... | 05/06/2008 |
| 7365943 | Thin film magnetic head and method for manufacturing the same A magnetic head has an opposite face opposite to a magnetic disk, a main pole having a distal end face and an inclined face exposed to the opposite face, and a shield yoke extended substantially facing the opposite face. An end face on which the shield yoke is oppos... | 04/29/2008 |
| 7365941 | Optical recording head including an optical resonant cavity An optical recording head including a media heating device to write and read data to a heat sensitive optical media disk. The media heating device includes an optical energy resonant cavity that produces a high intensity near-field optical spot of subwavelength dime... | 04/29/2008 |
| 7365942 | Thin-film magnetic head A thin-film magnetic head for perpendicular magnetic recording comprises a coil, a main magnetic pole layer for performing perpendicular recording, a write shield layer and a write gap layer, wherein the main magnetic pole layer comprises a main pole film portion an... | 04/29/2008 |
| 7363698 | Process for creating a write head by forming a bump after the top pole is formed Methods for creating a write head by forming a bump after the top pole is formed are provided. In one embodiment, a bottom pole is created out of a first layer. A non-magnetic gap material is applied to the surface of the wafer. A top pole is created out of a second... | 04/29/2008 |
| 7360296 | Method for reducing damage to sliders during lapping A process is described for fabricating sliders with reduced lapping damage to the hard-bias materials. The stack of layers for the magnetic sensor is deposited on a wafer and patterned into an initial shape. The hard-bias structures are fabricated at the side of the... | 04/22/2008 |
| 7359147 | Single pole magnetic head having intermediate magnetic layer and tip magnetic layer A thin film magnetic head has a magnetic pole major layer terminated at a position receding from a medium-opposed surface. An intermediate magnetic layer extends forward toward the medium-opposed surface from the surface of the magnetic pole major layer. The interme... | 04/15/2008 |
| 7359146 | Perpendicular magnetic recording element having stacked FM and AFM films applying magnetic bias along easy axis of soft magnetic film The soft magnetic film takes its hard axis along the direction in which a magnetic field is generated and its easy axis along a direction perpendicular to the direction of the writer magnetic field. The magnetic bias film applies a magnetic bias along the easy axis ... | 04/15/2008 |
| 7354664 | Magnetically soft, high saturation magnetization laminate of iron-cobalt-nitrogen and iron-nickel for perpendicular media underlayers A magnetic disk has a soft magnetic underlayer comprising a first layer containing NiFe having a concentration of iron that is at least thirty percent and not more than seventy percent; a second layer that adjoins the first layer and contains FeCoN having a concentr... | 04/08/2008 |
| 7337530 | Method for manufacturing a shielded pole magnetic head for perpendicular recording A method of making a perpendicular magnetic recording head for use in a data storage device includes forming a first pole layer, a second pole layer, a third pole layer, and a shield layer of a write section. The first pole layer, second pole layer, third pole layer... | 03/04/2008 |
| 7336450 | Magnetic head with optimum aspect ratio of upper shield layer A magnetic head contains a write magnetic head and a read magnetic head. The write magnetic head includes a lower core layer, an upper core layer arranged over the lower core layer, and a coil layer for applying a magnetic field to the lower and upper core layers. T... | 02/26/2008 |
| 7333294 | Perpendicular writer with reduced side track writing A disc drive head that includes a shared pole having high magnetic anisotropy layer which locally decreases the amplitude of dynamic field excitation of the shared pole at the write operation frequency to reduce side-writing of a disc media during a write operation.... | 02/19/2008 |
| 7333296 | Magnetic head for perpendicular magnetic recording including pole-layer-encasing layer that opens in the top surface thereof and nonmagnetic conductive layer disposed on the top surface of the pole-layer-encasing layer A pole layer is disposed in a groove of a pole-layer-encasing layer made of a nonmagnetic material with a nonmagnetic film disposed between the encasing layer and the pole layer. A polishing stopper layer made of a nonmagnetic conductive material is disposed on the ... | 02/19/2008 |
| 7330321 | Reference magnetic signal recording device and method of manufacturing the same A method of simultaneously recording multiple reference magnetic signals by using a magnetic head having multiple recording portions is provided. A writing yoke formed of a ferromagnetic material thin film and a back yoke are provided to a side wall of a slider, whi... | 02/12/2008 |
| 7327533 | Process and structure for a perpendicular writer having an exchange coupling discontinuity The non-zero remanence state that is associated with a single pole writer often results in self-pole-erasure (SPE). This problem has been overcome by inserting a very thin exchange de-coupling layer into the magnetic circuit of the write pole. This facilitates vorte... | 02/05/2008 |
| 7327532 | Bottom pole structure with back-side steps To generate a high data transfer rate from a magnetic write head, a faster flux rise time is needed. This often brings about severe excess saturation of the head and, as a result, adjacent track erasures often occur. This problem has been overcome by dividing the bo... | 02/05/2008 |
| 7324304 | Tapered write pole for reduced skew effect A write pole for a read/write head of a disk drive system has a tapered surface on a leading edge thereof. Preferably, the tapered surface has a taper angle of between 0 and 20 degrees from a plane normal to the ABS. By having a write pole with a taper in this manne... | 01/29/2008 |
| 7322095 | Process of manufacturing a four-sided shield structure for a perpendicular write head A process for reducing fringe field effects of a main write pole by shielding it on all four sides, with the regular return pole also serving as the leading edge shield, is described. The main pole may also be tapered and the leading edge and side shields may be mag... | 01/29/2008 |
| 7313863 | Method to form a cavity having inner walls of varying slope An improved mold, for use in the formation of a perpendicular magnetic write head, is described, together with a process for its manufacture. Conventional alumina is replaced by tantalum in the yoke portion of the mold. When both the tantalum and the alumina areas a... | 01/01/2008 |
| 7312951 | Magnetic head for perpendicular magnetic recording The invention provides a magnetic head for perpendicular magnetic recording having an air bearing surface positioned facing the recording surface of a recording medium, which records magnetic information on the recording medium by generating magnetic flux toward the... | 12/25/2007 |
| 7310202 | Magnetic recording head with clad coil A magnetic write head for recording data having reduced erasure caused by a magnetic field is disclosed. The magnetic write head include a main pole and a conductive coil positioned adjacent the main pole. The conductive coil is insulated from the main pole. The mag... | 12/18/2007 |
| 7304822 | Magnetic head with multilayer film including metal magnetic films and non-magnetic films and magnetic recording/reproducing device In a magnetic head, a multilayer film is disposed, the multilayer film including metal magnetic films and non-magnetic films that are alternately laminated, and a boundary between the multilayer film and a magnetic oxide substrate or a non-magnetic substrate on whic... | 12/04/2007 |
| 7301727 | Return pole of a transducer having low thermal induced protrusion A transducer including a return pole having a return pole tip extending to an external surface of the transducer. The external surface of the return pole tip has an area that is larger than a cross-sectional area of the return pole taken parallel to the external sur... | 11/27/2007 |
| 7298586 | Thin-film read element with multiple read sensors The present invention relates to a thin-film read element for use in reading magnetic signals from a device. The read element includes a first thin-film read sensor and a second thin-film read sensor that are each configured to convert the magnetic signals of the de... | 11/20/2007 |
| 7293344 | Process of making CD uniformity in high track density recording head A process for achieving tighter reader and writer track width control is disclosed. The write gap layer is used as the plating seed on which the upper pole is electro-formed. This allows the write gap layer to then be deposited through a precisely controllable proce... | 11/13/2007 |
| 7295401 | Laminated side shield for perpendicular write head for improved performance A perpendicular write head is disclosed for writing information onto tracks. The write head includes a top pole and a return pole and side shields with laminated layers wherein said laminated layers have magnetization in a direction parallel to an air bearing surfac... | 11/13/2007 |
| 7293345 | Method of manufacturing a thin film magnetic recording head A invention provides a method of manufacturing a thin film magnetic head is provided, capable of forming a magnetic pole layer as easily as possible. By etching a lower insulating layer and the upper insulating layer by RIE using a fluorine-based gas (CF4 | 11/13/2007 |
| 7292409 | Magnetic head with thin trailing pedestal layer A magnetic head for a disk drive is disclosed that has a first soft magnetic pole layer disposed in the head adjacent to a medium-facing surface and extending perpendicular to the medium-facing surface; a second soft magnetic pole layer disposed closer than the firs... | 11/06/2007 |
| 7292414 | External coil bias for giant magneto-resistive sensor A disk includes a perpendicular recording disk, a head having a read portion to read information recorded on the perpendicular recording disk, a sensor in the read portion, and a coil structure, coupled to the read portion, to provide bias flux to the sensor. The co... | 11/06/2007 |
| 7288333 | Magnetic film and thin film magnetic head using this magnetic film A soft magnetic film of the present invention is a plated film composed of Co and Fe, and columnar crystals extending in the film thickness direction are provided. In the present invention, columnar crystals extending in the film thickness direction are provided so ... | 10/30/2007 |
