Patent application number | Description | Published |
20090067087 | APPARATUSES AND METHODS FOR PRE-ERASING DURING MANUFACTURE OF MAGNETIC TAPE - The present invention relates to direct current (“DC”) pre-erasing servo channels of a magnetic tape prior to writing servo data in a servo channel. The present invention particularly relates to those servo recordings which were written with a uni-polar current waveform. The DC pre-erase is performed using a uni-polar direct current of a polarity that is opposite to the polarity of the direct current used to write the servo data. This pre-erase may be done with one or more heads. Also, as will be described, the pre-erase of a servo channel and writing to a servo channel may be done by making two passes over a single head or by using two or more heads to perform both steps. Also, it is within the scope of the present invention to have the heads mounted on a single mount or have the heads on separate mounts and on separate tape decks. | 03-12-2009 |
20090097155 | MAGNETIC MEDIA HAVING A SERVO TRACK WRITTEN WITH A PATTERNED MAGNETIC RECORDING HEAD - A thin film magnetic recording head utilizing a timing based servo pattern is fabricated using a focused ion beam (FIB). The recording head is fabricated by sputtering a magnetically permeable thin film onto a substrate. A gap pattern, preferably a timing based pattern, is defined on the thin film and the FIB cuts a gap through the thin film based on that pattern. Once completed, the recording head is used to write a servo track onto magnetic tape. The timing based servo track then allows for the precise alignment of data read heads based on the positional information obtained by a servo read head which scans the continuously variable servo track. | 04-16-2009 |
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 |
20090262452 | MULTICHANNEL 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. | 10-22-2009 |
20090262456 | METHOD OF FORMATTING MAGNETIC MEDIA USING A THIN FILM PLANAR ARBITRARY GAP PATTERN MAGNETIC HEAD - Methods of formatting media using planar magnetic heads. A head may comprise a substrate having conductive thru-hole vias extending therethrough, a first magnetic layer deposited and patterned on the substrate, a first insulation layer deposited and patterned on the first magnetic layer, a conductive coil layer deposited and patterned on the first insulation layer and connected to the conductive thru-hole vias, a second insulation layer deposited and patterned on the conductive coil layer, vias patterned into the insulation layer extending to the first magnetic layer, a second magnetic layer deposited in the vias, and a third magnetic layer deposited and patterned on the second insulation layer and second magnetic layer. The third magnetic layer may be connected to the first magnetic layer through the second magnetic layer deposited in the vias of the insulation layers. | 10-22-2009 |
20090277869 | SOLID STATE MEMBRANE CHANNEL DEVICE FOR THE MEASUREMENT AND CHARACTERIZATION OF ATOMIC AND MOLECULAR SIZED SAMPLES - A solid state device is formed through thin film deposition techniques which results in a self-supporting thin film layer that can have a precisely defined channel bored therethrough. The device is useful in the chacterization of polymer molecules by measuring changes in various electrical characteristics as molecules pass through the channel. To form the device, a thin film layer having various patterns of electrically conductive leads are formed on a silicon substrate. Using standard lithography techniques, a relatively large or micro-scale aperture is bored through the silicon substrate which in turn exposes a portion of the thin film layer. This process does not affect the thin film. Subsequently, a high precision material removal process is used (such as a TEM) to bore a precise nano-scale aperture through the thin film layer that coincides with the removed section of the silicon substrate. | 11-12-2009 |
20100002332 | Optical Path for a Thermal-Assisted Magnetic Recording Head - An optical path or waveguide for a laser-assisted transducing head is disclosed. The optical path extends between the poles of the transducing head to near the write gap. A solid-state laser is attached to or incorporated into the slider or head and is positioned to direct thermal energy through a waveguide and onto a track of a read/write surface to lower the coercivity of the recording medium to facilitate the write process. | 01-07-2010 |
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 |
20100027153 | THIN FILM PLANAR ARBITRARY GAP PATTERN MAGNETIC HEAD - Planar magnetic heads and methods of making the same using a built-up approach and thru-hole via technology to achieve a true planar head. A head may comprise a substrate having conductive thru-hole vias extending therethrough, a first magnetic layer deposited and patterned on the substrate, a first insulation layer deposited and patterned on the first magnetic layer, a conductive coil layer deposited and patterned on the first insulation layer and connected to the conductive thru-hole vias, a second insulation layer deposited and patterned on the conductive coil layer, vias patterned into the insulation layer extending to the first magnetic layer, a second magnetic layer deposited in the vias, and a third magnetic layer deposited and patterned on the second insulation layer and second magnetic layer. The third magnetic layer may be connected to the first magnetic layer through the second magnetic layer deposited in the vias of the insulation layers. | 02-04-2010 |
20100027164 | MAGNETIC MEDIA FORMED BY A THIN PLANAR ARBITRARY GAP PATTERN MAGNETIC HEAD - Magnetic media made using planar magnetic heads. A head may comprise a substrate having conductive thru-hole vias extending therethrough, a first magnetic layer deposited and patterned on the substrate, a first insulation layer deposited and patterned on the first magnetic layer, a conductive coil layer deposited and patterned on the first insulation layer and connected to the conductive thru-hole vias, a second insulation layer deposited and patterned on the conductive coil layer, vias patterned into the insulation layer extending to the first magnetic layer, a second magnetic layer deposited in the vias, and a third magnetic layer deposited and patterned on the second insulation layer and second magnetic layer. The third magnetic layer may be connected to the first magnetic layer through the second magnetic layer deposited in the vias of the insulation layers. | 02-04-2010 |
20100195241 | ZONE TEXTURED RECORDING HEAD - The present disclosure relates to a magnetic recording head having a slider media bearing interface surface with surface modifications configured to reduce friction and/or stiction friction properties between the head slider media bearing interface surface and a recording medium. The present disclosure also relates to a tape drive system, a method of formatting a recording medium using such a magnetic recording head, and the resulting formatted media. | 08-05-2010 |
20100196737 | PATTERNED BURNISH HEAD - The present disclosure relates to a burnishing head for processing the surface of a hard disk media. The burnishing head includes a body having cutting features comprised of a thin film material. In many embodiments, the thin film material may be diamond. In some embodiments, the cutting features may be features formed in the diamond film. In alternative embodiments, the cutting features may be features formed in the body and coated with a diamond film. In another embodiment, the present disclosure relates to a burnishing head including a body having a first surface having a well-behaved air bearing surface and a second surface having a plurality of burnishing pedestals for providing burnishing of a media surface. The pedestals include a plurality of micro cutting features etched therein. The present disclosure also relates to magnetic media made at least in part by using such a burnishing head. | 08-05-2010 |
20100208431 | Patterned Composite Structures and Methods of Making the Same - The present disclosure relates to a patterned surface composite structure. The structure includes a first material having a specific coefficient-of-thermal-expansion and a second material having a different coefficient-of-thermal-expansion. The first material can be patterned with specific features and the second material may be located between those features, thereby forming areas having a coefficient-of-thermal-expansion between that of the first and second materials. A thermally emissive device, such as a laser diode, may be attached to a surface of the patterned composite structure. | 08-19-2010 |
20100240222 | WAFER FIXTURE FOR WET PROCESS APPLICATIONS - The present invention is a wafer fixture comprising a housing body, a thrust plate, a flexure clamp, gaskets, flexure pins on an inner circumference of the housing body, locking grooves on an outer circumference of the flexure clamp, and a handle. A wafer may be placed between the gaskets of the housing body and the thrust plate. The flexure clamp may be placed over the thrust plate and secured to the housing body by rotating the flexure clamp such that locking grooves of the fixture plate mate with the flexure pins on the inner circumference of the housing body. The present invention in yet another embodiment is a wafer etch tool comprising a housing, a flexure clamp, and means for securing a wafer between the housing and the flexure clamp upon rotation of the flexure clamp within the housing. | 09-23-2010 |
20100284105 | APPARATUSES AND METHODS FOR PRE-ERASING DURING MANUFACTURE OF MAGNETIC TAPE - The present invention relates to direct current (“DC”) pre-erasing servo channels of a magnetic tape prior to writing servo data in a servo channel. The present invention particularly relates to those servo recordings which were written with a uni-polar current waveform. The DC pre-erase is performed using a uni-polar direct current of a polarity that is opposite to the polarity of the direct current used to write the servo data. This pre-erase may be done with one or more heads. Also, as will be described, the pre-erase of a servo channel and writing to a servo channel may be done by making two passes over a single head or by using two or more heads to perform both steps. Also, it is within the scope of the present invention to have the heads mounted on a single mount or have the heads on separate mounts and on separate tape decks. | 11-11-2010 |
20100296192 | PATTERNED MAGNETIC RECORDING HEAD WITH TERMINATION PATTERN - A thin-film magnetic recording head utilizing a timing based servo pattern is fabricated by sputtering a magnetically permeable thin film onto a substrate. A gap pattern, preferably a timing based pattern, is defined by the thin film. The gap pattern includes termination patterns or endpoints that are elliptical or diamond-shaped. | 11-25-2010 |
20100321824 | MAGNETIC RECORDING HEAD HAVING SECONDARY SUB-GAPS - A magnetic head and method for making same which can be used for formatting or writing servo tracks or data on a tape. In one example, the magnetic head may include a magnetic thin film layer; at least one gap defined in the magnetic thin film layer; and at least one secondary sub-gap structure within the magnetic thin film layer, the at least one gap positioned proximate the at least one secondary sub-gap structure. Through the use of the secondary sub-gap structure, the gap (i.e. a record gap or channel) can be made thinner than in conventional heads. | 12-23-2010 |
20110002065 | RECORDING HEADS WITH EMBEDDED TAPE GUIDES AND MAGNETIC MEDIA MADE BY SUCH RECORDING HEADS - The present disclosure relates to apparatus and methods for recording heads with tape guides, including embedded tape guides. In one embodiment a magnetic recording head includes a contour modified to include a tape guide. The tape guide may include compliant or non-compliant edge guides. In another embodiment, a magnetic recording head includes a contour configured to impart a lateral force on the surface of tape streaming over the head. The head may include air-bleed slots, air skiving edges, non-symmetrical head surfaces, specific contour topographies, negative pressure elements, or any combination thereof. The streaming tape may be held referenced against the a tape guide by the lateral force. In a further embodiment, the present disclosure relates to magnetic tape wherein the written-in lateral tape motion is substantially eliminated. | 01-06-2011 |
20110043940 | ERASE DRIVE SYSTEM AND METHODS OF ERASURE FOR TAPE DATA CARTRIDGE - The present disclosure relates generally to writing and reading data from a magnetic tape storage media and, more particularly, to a secure erasure system for the eradication of the data contained in the data tracks of a tape media such that substantially all of the data can be erased while leaving the servo bands substantially unaltered or within specification. A data tape cartridge erased with such a system can then be reused in a secure data storage environment with complete confidence that any data from a previous usage is not subject to discovery. | 02-24-2011 |
20110141604 | MAGNETIC MEDIA FORMATTED WITH AN INTERGRATED 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. | 06-16-2011 |
20110286126 | 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. | 11-24-2011 |
20120069473 | MAGNETIC MEDIA FORMED BY A THIN PLANAR ARBITRARY GAP PATTERN MAGNETIC HEAD - Magnetic media made using planar magnetic heads. A head may comprise a substrate having conductive thru-hole vias extending therethrough, a first magnetic layer deposited and patterned on the substrate, a first insulation layer deposited and patterned on the first magnetic layer, a conductive coil layer deposited and patterned on the first insulation layer and connected to the conductive thru-hole vias, a second insulation layer deposited and patterned on the conductive coil layer, vias patterned into the insulation layer extending to the first magnetic layer, a second magnetic layer deposited in the vias, and a third magnetic layer deposited and patterned on the second insulation layer and second magnetic layer. The third magnetic layer may be connected to the first magnetic layer through the second magnetic layer deposited in the vias of the insulation layers. | 03-22-2012 |
20130188272 | 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. | 07-25-2013 |