Matches 351 - 400 out of 1104 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >
Match Document Document Title
5680285 Magnetic disk having improved surface configuration and magnetic disk unit including same  
There is disclosed a magnetic disk having a surface shape so designed as to satisfy flying and sliding characteristics in CSS and to avoid head adhesion even in a high-density recording. The...
5680267 Disk apparatus used with a recording medium having clock marks detected by clock interpolation  
Clock marks for sampling clock components have been formed in advance at constant intervals along the tracks of a disk recording medium and, when rotationally driving the disk recording medium,...
5679474 Overwritable optomagnetic recording method and medium having a layer with curie temperature which varies in the thickness direction  
A magneto-optical recording medium with wide operating margins is disclosed. The magneto-optical recording medium includes a vertical magnetic films of exchange-coupled liminated structure composed...
5677819 Magnetic disk having improved servo area for protecting equal time interval characteristics and for preventing azimuth loss  
A magnetic disk is provided with a track divided by servo areas to record servo signals and data areas to record data signals. Within the servo area, an exclusive region is previously formed to...
5675462 Disk used for calibrating floating height of protrusion detection head, method of calibrating floating height of protrusion detection head using the disk and glide tester using the method  
A bump disk including a standard protrusion having a predetermined height and a plurality of reference protrusions positioned either on substantially the same radial line as the standard protrusion...
5674582 Magnetic disk having enhanced zone lubrication  
Thin film disk media which is initially coated with lubricant from the ID or normal head landing area radially outwardly across the data zone. The initially applied lubricant area is thinned and...
5660929 Perpendicular magnetic recording medium and method of producing same  
A perpendicular magnetic recording medium is fabricated based on R 21 -60 (Fe 1 -y Co y ) z M 0 -10 wherein z is balance and at least 70 at % of R is Nd and/or Pr, the balance of R being one or...
5656385 Magnetic recording medium and information recording-reproduction method using the same  
A magnetic recording medium having a recording layer made up of a ferrimagnetic material whose compensation temperature is included within room temperatures and an information...
5652838 Smart disc cd-rom  
A CD-ROM, that is adapted for the protection of electronically transmitted data, comprising a CD-ROM, having a hub containing a battery power supply and a microprocessor, which receives signals...
5650900 Magnetic disc with zoned lubricant thickness  
A magnetic disc for a computer disc drive has distinct zones of differing lubricant thickness. A bonded+mobile zone covers a portion of the disc which preferably coincides with the landing zone. A...
5650889 Magnetic recording medium containing heavy rare gas atoms, and a magnetic transducing system using the medium  
A magnetic recording medium having a high coercivity and a high S/N ratio for high-density operation can include either a conductive or a nonconductive substrate. If the substrate is nonconductive,...
5635269 Precision-etched textured stop/start zone for magnetic-recording disks  
A magnetic-recording disk comprising a metal substrate disk having a textured annular first surface area with an outer diameter which is substantially less than the diameter of the metal substrate...
5631058 High throughput manufacturing of thin film data recording disks  
According to the present invention, a blank of an aluminum alloy is partially cut so as to form several disks maintained in the blank by portions of the remaining uncut aluminum. This results in...
5627946 Hard disk format using frames of sectors to optimize location of servo bursts  
A hard disk format is disclosed which sequentially arranges a number of different sector types, each having a different format, into frames which are repeated around the tracks of a magnetic disk....
5623386 Magnetic recording component  
A magnetic memory recording component comprises a substrate adapted to support a magnetic memory storage medium coating. The substrate has at least a silicon carbide ceramic outer surface. If the...
5620767 Light reflecting and heat dissipating material and optical information recording medium using the same  
A light reflecting and heat dissipating material which is capable of reflecting light and dissipating heat transmitted thereto from a layer in contact with or adjacent to the material to cool the...
5619480 Magnetic recording medium and recording/reproducing method therefor as well as information processing apparatus by means thereof  
The present invention relates to a magnetic recording medium of a disk shape having a magnetic layer containing a magnetic material formed on a non-magnetic support and having, between the...
5613082 Control of record media using device only accessible control areas and directory of media control marks and error history  
A data storage system includes a data storage medium, such as a magnetic tape, that has a first control data storing area or drive partition that is addressable only by a peripheral drive mounting...
5612834 Servo burst controller for a magnetic disk  
A novel disk controller and method performed by a disk controller is disclosed which provides a highly efficient means of interrupting the reading or writing of a field in a sector on a magnetic...
5606206 Device for detecting the position of an optical or magnetic head used on linear motors  
In one embodiment, a device for detecting the position of a head attached to a linear motor, the detection device comprises an extension member for guiding and directing flux therein. A moving coil...
5604014 Magnetic recording medium and manufacturing method for the same  
A magnetic recording medium including a nonmagnetic base plate with textured trenches formed thereon. The resulting textured nonmagnetic base plate includes a mean line depth Rv of no more than 500...
5603814 Magneto-optical disk  
A method of making a magneto-optical disk. A first AlGeN dielectric film is formed by reactive sputtering on a substrate. Two targets, one of aluminum and one of germanium, are used in the...
5599635 Magnetic recording system  
A magnetic recording system for recording signals onto coat-type magnetic tape using magnetic powder by using a magnetic head, and a magnetic recording system for recording signals onto a coat-type...
5592348 Method and structure for locating and skipping over servo bursts on a magnetic disk  
A novel disk controller and method performed by a disk controller is disclosed which provides a highly efficient means of interrupting the reading or writing of a field in a sector on a magnetic...
5590009 Magnetic disk unit  
A step h is provided between a recording region 2 including servo patterns Ps1, Ps2 and the recording track pattern Pw and a non-recording region 3 except the servo patterns Ps1, Ps2 and the...
5589262 Perpendicular magnetic recording medium having a soft magnetic underlayer with a stripe magnetic domain structure  
A perpendicular magnetic recording medium for use on a magnetic recording/reproducing apparatus which has a magnetic head for recording/reproduction includes a substrate, a magnetic recording layer...
5587860 Magnetic disc cartridge including a magnetic disc having a cleaning sheet composed of a non-theroplastic fiber  
A magnetic disc cartridge comprising a cartridge case, a magnetic disc housed rotatably in the cartridge case, and a liner, which serves as a cleaning sheet, secured on the inner surface of the...
5586040 Process and apparatus for controlled laser texturing of magnetic recording disk  
Controlled laser texturing of a magnetic recording disk is accomplished by use of a textured test band on the disk and an analyzing laser system to provide feedback to the texturing laser. The...
5585989 Magnetic disc substrate and a magnetic disc using the same  
Using a thermoplastic norbornene type plastic as a material for the magnetic disc substrate, a magnetic disc substrate having a small deformation and a high modulus of elasticity is prepared. By...
5585200 Over write capable magnetooptical recording medium  
An overwritable method of magnetooptical recording uses an over write capable magnetooptical recording medium that comprises a substrate and a magnetic layer. The magnetic layer is stacked on the...
5583727 Multiple data layer magnetic recording data storage system with digital magnetoresistive read sensor  
A magnetic recording data storage system uses a medium substrate with multiple data layers formed on it and a magnetoresistive (MR) read sensor that provides a direct digital output as it reads...
5583715 Image data communication apparatus  
There is disclosed an image data communicating apparatus which has a floppy disc drive and can store communication image data onto a floppy disc. The apparatus has a clock circuit, a memory, and a...
5576918 Magnetic disk medium with designed textured surfaces and controlled surface roughness and method of producing same  
In a magnetic disk medium, a substrate is etched to have a designed, controlled topography. A magnetic recording medium and a protective layer are provided over the substrate. A method for...
5569518 Glass substrate for a magnetic disk with roughened edges  
A glass substrate for a magnetic disk having an inner peripheral edge and an outer peripheral edge, wherein the surface of at least the inner peripheral edge is treated by etching to have a surface...
5569506 Magnetic recording disk and disk drive with improved head-disk interface  
A thin film metal alloy magnetic recording disk has an improved protective overcoat that creates a low level of static friction in a contact start/stop disk drive. The disk has an amorphous carbon...
5568331 Method of head positioning and magnetic recording disk drive using the same  
A method and device of head positioning in an information recording/reading device in which a magnetic recording medium with data tracks for recording information thereon is provided and a magnetic...
5565266 Multilayer magnetooptic recording media  
A magnetooptic medium which includes a substrate, an amorphous seed layer and a recording multilayer layer. The seed layer is ITO, Si or SiC, and the recording multilayer includes alternating...
5563000 Multilayer magnetooptic recording media  
A magnetooptic medium which includes a substrate and a seed layer having at least two layers including a first layer of amorphous ZTO or ITO formed on the substrate and a metal layer formed on the...
5560977 Magnetic recording medium and manufacturing the same  
An object of the present invention is to offer a magnetic recording medium comprising a substrate and a magnetic film formed on the substrate, wherein the substrate is formed using a conductive...
5550696 Magnetic recording disk having textured test band for controlling texture in the slider landing zone  
A magnetic recording disk has a textured test band that is radially spaced from the textured landing zone and that typically has laser-induced bumps with an average height substantially different...
5548454 Information recording disk, its production method and recording apparatus  
In the information recording disk, the positioning signal of the information convertor is provided permanently, as a change in shape or material, to the front and reverse surfaces of the disk...
5540973 Magnetic recording medium and a method for manufacturing such medium  
A magnetic recording medium with improved friction and levitation characteristics and undiminished electromagnetic conversion characteristics, and a method for manufacturing such a medium, are...
5537282 Data storage disk having improved tracking capability  
In the present invention a magnetic data storage includes disk recesses formed in the magnetic layer. The recesses are located in pairs on opposite sides of the data tracks, and the disk is...
5536589 Magneto-optical recording medium  
A magneto-optical recording medium on which rewriting is possible is composed of a substrate and a recording layer exhibiting perpendicular anisotropy formed thereon. The recording layer consists...
5536456 Optical disc and method for making  
Resin, typically polycarbonate is injection molded into a disc substrate under select conditions, for example, at a mold temperature of 100-160° C., an injection velocity of 100-120 g/sec., and a...
5535069 Very high-density diskette format method and computer-implemented process  
A diskette comprising a jacket, a liner material disposed within said jacket, a flat circular media having a magnetic coating on both sides disposed within said liner material, a hub attached at...
5534321 Disk substrate for magnetic memory devices  
This invention is directed to the fabrication of substrates for rigid information disks for use in a magnetic storage device, the surface of the substrate comprising a smooth area and a low...
5530609 Magnetic recording/reproducing method using a thin film magnetic  
In a method for magnetically recording and reproducing signals in and from a magnetic recording medium via a thin film magnetic head, the recording medium has a magnetic layer of up to 0.5 μm...
5526211 Banded magnetic recording disk with equally-angularly-spaced servo sector  
A method and means is described wherein servo sectors written on a disk (or servo sections written on a tape) are equally spaced on a given track and read during seek, settle and track following...
5526202 Disk drive embedded servo system having a servo field with an asymmetrical position subfield  
An embedded servo system for a disk drive is disclosed. An asymmetrical position sub-field reduces the overhead of the disk position system. The sub-field includes at least two normal frame pairs...
Matches 351 - 400 out of 1104 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >