| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 360121000 | Plural gaps | 16 |
| 20080273264 | PLANAR SERVO WRITE HEAD - A servo write head that provides fast servo pattern writing and improved tape manufacturing speed is provided. The write head may be fabricated using thin-film fabrication techniques. A coil is formed on a bottom pole of the write head. The coil has a plurality of turns that enable the write head to generate a magnetic field sufficient for writing data with reduced current. The inductance of the coil is reduced due to its small dimensions. Reduced inductance of the coil may enable increased switching frequency of the write head, allowing data to be written at a higher frequency. The write head includes a planar top pole coupled to the bottom pole. The top pole has more than one write gap is formed therein. | 11-06-2008 |
| 20090067088 | RECORDING AND/OR PLAYBACK DEVICE COMPRISING MULTIPLE AZIMUTH MAGNETIC HEADS - A device for recording on and/or reading from a magnetic medium with magnetic tracks, including plural magnetic heads each including a pair of polar parts separated by an amagnetic head gap with a given azimuth angle. The pairs of polar parts are distributed on fixed supports, the head gaps of the pairs of polar parts on a particular support all having the same azimuth angle. At least two supports include pairs of polar parts with different azimuth angles, each support having a given tilt angle from the magnetic tracks. | 03-12-2009 |
| 20090147399 | MAGNETIC MEDIA FORMATTED WITH AN INTEGRATED THIN FILM SUBGAP SUBPOLE STRUCTURE FOR ARBITRARY GAP PATTERN MAGNETIC RECORDING HEAD - An arbitrary gap thin film magnetic recording head is fabricated by forming a substrate based on traditional vertical planar thin film head wafer technology which is designed to produce an integrated subgap and subpole substrate structure. The wafer is then processed into row bars to reveal, in a plane parallel to the transducing direction of the medium, the subgap and subpoles at the surface of the row bar and to bring the structure to a certain coil depth or gap depth. A flat or cylindrical contour may be utilized. | 06-11-2009 |
| 20090190256 | Single pole tip write head design for perpendicular recording media having reduced dependence on soft underlayers - A thin film, perpendicular write head for use with recording media with or without a soft under layer is disclosed. The present invention comprises an tapered auxiliary pole, situated below the main write pole and separated from the write pole by a lower non-magnetic gap. The auxiliary pole alleviates problems such as erasure after write, and cross track stray erasure fields, associated with operating conventionally designed perpendicular writes heads with media having no soft under layer. | 07-30-2009 |
| 20090190257 | MAGNETIC HEAD AND METHOD OF MANUFACTURING THEREFOR - A magnetic head includes a magnetic pole for writing. The magnetic pole is formed by laminating a first magnetic layer and a second magnetic layer so as to sandwich a write gap on the magnetic pole end side. The second magnetic layer is formed to be laminated on the write gap in a region in which the write gap is provided. The second magnetic layer is laminated on an insulating layer via an adhesive layer in a region other than the write gap. | 07-30-2009 |
| 20100002335 | METHOD OF MAKING A MULTI-CHANNEL TIME BASED SERVO TAPE MEDIA - A thin film magnetic recording head is fabricated by forming a substrate from opposing ferrite blocks which have a ceramic member bonded between them. This structure is then diced to form a plurality of columns, wherein each column has a ferrite/ceramic combination. Each column represents a single channel in the completed head. A block of ceramic is then cut to match the columned structure and the two are bonded together. The bonded structure is then cut or ground until a head is formed, having ceramic disposed between each channel. A ferrite back-gap is then added to each channel, minimizing the reluctance of the flux path. The thin film is patterned on the head to optimize various channel configurations. | 01-07-2010 |
| 20110222187 | Low Track Pitch Write Module And Bidirectional Tape Head - A low track pitch write module and bidirectional tape head for writing and/or reading data on a magnetic recording tape. The write module and tape head have a tape bearing surface for engaging the magnetic recording tape and plural write elements. The write elements are arranged so that the write gaps of adjacent write elements are spaced from each other by not more than approximately one write gap width, while being generally aligned along an axis that is perpendicular to a direction of movement of the magnetic recording tape. The write elements may have a planar or vertical construction comprising plural thin film layers oriented in generally parallel or perpendicular relationship with the tape bearing surface. One or more read element arrays may also be provided. | 09-15-2011 |
| 20120075748 | PERPENDICULAR WRITE HEAD WITH LAMINATED SIDE SHIELDS - A perpendicular write head, the write head having an air bearing surface, the write head including a magnetic write pole, wherein at the air bearing surface, the write pole has a trailing side, a leading side that is opposite the trailing side, and first and second sides; side gaps, wherein the side gaps are proximate the write pole along the first and second side edges; and side shields proximate the side gaps, wherein the side shields have gap facing surfaces and include at least one set of alternating layers of magnetic and non-magnetic materials, wherein only one kind of material makes up the gap facing surfaces at the air bearing surfaces. | 03-29-2012 |
| 20120081813 | WIRING STRUCTURE, DATA RECORDING DEVICE, AND ELECTRONIC APPARATUS - A wiring structure includes: positive signal wires configured to transmit a positive signal of differential signals; and negative signal wires configured to transmit a negative signal of the differential signals. The positive signal wires and the negative signal wires are interleaved. A first gap length and a second gap length are different from each other where the first gap length is a gap length between a first wire being an outermost wire among the positive signal wires and the negative signal wires and a first adjacent wire that is adjacent to the first wire, where the second gap length is a gap length between a second wire that is located inside among the positive signal wires and the negative signal wires and a second adjacent wire that is adjacent to the second wire. The second wire and the second adjacent wire are different from the first wire. | 04-05-2012 |
| 20130321953 | WRITE HEAD AND APPARATUS - A write head comprising a yoke having at least a first and a second gap and a coil for producing a magnetic field at each gap, the coil comprising a plurality of windings, wherein the windings are arranged so as to produce the same magnetic field strength at each gap and/or along each gap by use of a proximity effect between the windings and a respective gap. | 12-05-2013 |
| 20140085751 | METHOD OF MAKING A MULTI-CHANNEL TIME BASED SERVO TAPE MEDIA - A thin film magnetic recording head is fabricated by forming a substrate from opposing ferrite blocks which have a ceramic member bonded between them. This structure is then diced to form a plurality of columns, wherein each column has a ferrite/ceramic combination. Each column represents a single channel in the completed head. A block of ceramic is then cut to match the columned structure and the two are bonded together. The bonded structure is then cut or ground until a head is formed, having ceramic disposed between each channel. A ferrite back-gap is then added to each channel, minimizing the reluctance of the flux path. The thin film is patterned on the head to optimize various channel configurations. | 03-27-2014 |
| 20150077881 | APPARATUS WITH A LAPPING GUIDE WITHIN A SPAN OF THE TRANSDUCER ARRAY - An apparatus according to one embodiment includes a magnetic head having an array of transducers. An axis of the array is defined between outermost ones of the transducers. The transducers are arranged in at least two clusters of adjacent transducers, and the transducers in each respective cluster have about a same transducer pitch. A gap is defined between proximally adjacent clusters. A width of the gap measured along the axis of the array is greater than the transducer pitch of one of the clusters. An electrical lapping guide (ELG) located in the gap or aligned with the gap orthogonally to the axis. | 03-19-2015 |
| 20160005424 | MULTI-STACK READER WITH SPLIT MIDDLE SHIELD - A reader includes top and bottom reader stacks disposed between a top and bottom shield. The top and bottom reader stacks are offset relative to each other in a downtrack direction. Top side shields surround the top reader stack in a crosstrack direction, and bottom side shields surround the bottom reader stack in the crosstrack direction. A split middle shield is between the top and bottom reader stacks and the top and bottom side shields. The split middle shield includes top and bottom portions separated by an isolation layer, the top and bottom portions respectively coupled to the top and bottom reader stacks. | 01-07-2016 |
| 20160005425 | LEADS COUPLED TO TOP AND BOTTOM READER STACKS OF A READER - A reader includes top and bottom reader stacks that are offset relative to each other in a downtrack direction and disposed between a top shield and a bottom shield. Top side shields surround the top reader stack in a crosstrack direction, and bottom side shields surround the bottom reader stack in the crosstrack direction. A middle shield is between the top and bottom reader stacks and the top and bottom side shields. The middle shield includes a common electrical conductive path coupled to the top and bottom reader stacks. A middle lead is coupled to an edge of the middle shield. | 01-07-2016 |
| 20160125897 | MASS PRODUCTION OF MULTICHANNEL CURRENT PERPENDICULAR TO PLANE HEAD MODULES VIA PREFERRED MILLING - A process according to one embodiment includes milling a media facing surface of a module having an array of sensors at a first angle, and milling the media facing surface of the magnetic head module at a second angle, not necessarily in that order. After the milling at the first and second angles, the media facing surface of the module is milled at a third angle between 55 degrees and 65 degrees from normal. An apparatus according to one embodiment includes a tape head module having an array of at least eight current perpendicular to plane sensors, wherein none of the sensors has a resistance more than about 10% away from the resistances of its nearest neighbors. | 05-05-2016 |
| 20160133281 | MAGNETIC WRITER HAVING MULTIPLE GAPS WITH MORE UNIFORM MAGNETIC FIELDS ACROSS THE GAPS - 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. | 05-12-2016 |
