Matches 251 - 300 out of 1104 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >
Match Document Document Title
6048255 Pulsed laser surface treatments for magnetic recording media  
A surface treatment process employing pulsed laser energy enables selective texturizing and polishing of non-magnetizable substrate disks used in fabricating magnetic reading and recording media....
6043961 Magnetic recording medium and method for producing the same  
The method for producing a magnetic recording medium, includes the steps of (a) subjecting surfaces of a substrate to grinding by a ductile-mode grinding with a grinding wheel having a setting...
6042927 Magnetic disk  
A magnetic disk yields an excellent off-track characteristics and a high coercive force if a track density is increased. The magnetic disk includes a non-magnetic plate on which data such as a...
6040031 Contact recording magnetic disk device  
In order to provide a contact type magnetic disk device enabling a high density recording with improved reliability and sufficient robustness against wearing, a magnetic recording disk of the...
6040029 Glass substrate of disk for recording information, a disk for recording information, and a disk device for recording information  
In accordance with the present invention, a glass substrate of a disk for recording information, containing oxides of rare earth elements and fine particles dispersed therein, and a disk for...
6038113 Surface Characteristics of a Magnetic disk and a magnetic disk apparatus  
A magnetic disk for writing and reading information by a contact reading method comprises a plurality of asperities upon the surface of the disk. For extending the life of the disk by reducing...
6021032 Magnetic recording medium with laser textured data zone  
The substrate of a magnetic recording medium is laser textured using a continuous wave laser light beam and microfocusing lens system to form a laser textured data zone comprising a plurality of...
6020079 Magneto-optical recording medium and reproducing method for information recorded on the medium  
A magneto-optical recording medium capable of performing magnetically induced super resolution reproduction by perfectly masking a mark adjacent to a mark to be reproduced. The magneto-optical...
6020060 Magnetic recording medium, process for producing the same and magnetic disk device  
A magnetic recording medium characterized by comprising: a nonmagnetic substrate; and, provided on the nonmagnetic substrate in the following order, a first underlayer of a nonmagnetic material...
6017605 Magnetic recording medium  
A magnetic recording medium is described, which comprises a support having thereon a magnetic layer mainly comprising a ferromagnetic powder dispersed in a binder, for a magnetic...
6014296 Magnetic disk, method of manufacturing magnetic disk and magnetic recording apparatus  
A magnetic disk including a substrate, a recording track section which is made of a magnetic member for recording and reproducing information magnetically and is provided on the substrate, and a...
6013336 Procedure employing a diode-pumped laser for controllably texturing a disk surface  
A process for creating a "distant bump array" surface texture in a magnetic recording disk for reducing stiction and the disk so textured. The texturing process uses a tightly focused diode-pumped...
6010794 ***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Magnetic recording media for longitudinal recording  
A magnetic recording medium including a substrate and a magnetic layer on the substrate which is a Co-based alloy including Pt and/or Ir, including at least one of Ti, Zr, Hr, V, Nb, Ta, Cr, Mo, W,...
6007896 Surfaces having optimized skewness and kurtosis parameters for reduced static and kinetic friction  
A low friction non-gaussian surface is disclosed which has a positive skewness value and a kurtosis value of three or greater which minimizes static and kinetic friction and resultant wear in any...
6005728 Disk recording medium for embodying high capacity hard disk drive  
A disk recording medium includes a servo track pattern where a gray code field has been deleted, capable of embodying a high capacity hard disk drive. The hard disk drive which uses as a recording...
6001467 Magneto-optic memory medium  
A magneto-optic memory medium comprising a dielectric film, a magneto-optic memory film, a dielectric film and a reflective film superposed in layers on a light trnasmitting substrate, the...
5991111 Edge recorded magnetic tape and read head  
A magnetic recording medium (12) and a magnetic recording apparatus (10) that makes use of the magnetic recording medium is disclosed. The magnetic recording medium includes an elongated magnetic...
5987003 Coated disk substrate having a small thickness region  
A disk substrate for use in manufacturing a recording disk therefrom has an outer non-recording area, recording area, inner non-recording area and a central opening. The inner non-recording area...
5985403 Magnetic recording medium and magnetic recording reproducer  
A magnetic recording medium comprising a non-magnetic substrate and a magnetic layer and a protective layer which are formed on the non-magnetic substrate in that order, wherein a substance(s) as a...
5981903 Laser system for simultaneous texturing of two sides of a substrate  
A laser system is described which concurrently directs highly equivalent diffracted beams derived from an initial laser beam to both sides of a substrate. The diffracted beams may be generated with...
5980791 Method for forming a molded-in lifter for cleaning a flexible magnetic disc  
A method for forming a molded-in lifter for supporting a fabric liner of a flexible magnetic recording disc so that the disc is cleaned by rotation of the disc with respect to the liner when the...
5978189 Substrate for a magnetic recording medium having laser beam absorption characteristic and a magnetic recording medium using the substrate  
A substrate for a magnetic recording medium. The substrate is a non-magnetic brittle material having a substantially flat surface on which laser marks having a height in a range of 10-500 Å are...
5973894 Magnetic recording medium and process for producing same  
A magnetic recording medium having a substrate disc with microscopic bumps formed by focusing a laser beam, wherein spacings D between adjacent bumps in the circumferential direction of the disc...
5968627 Metal foil disk for high areal density recording in environments of high mechanical shock  
The invention provides exemplary magnetic recording media, and in particular, flexible metal foil disks, read/write systems having such disks, and methods for making such disks. In one exemplary...
5959814 Magnetic disk having separate park and take-off zones  
A disk configured to store magnetically readable data is comprised of three distinct annular regions: a parking zone, a take-off zone, and a data storage area. The parking zone is heavily textured...
5956217 Reference disk for determining glide height  
A reference disk, used to determine the glide height of a transducer head above the surface of a magnetic recording medium, is accurately formed by employing a laser light beam to produce...
5952074 Magnetic recording medium  
A magnetic recording medium wherein thickness of the magnetic layer is less than the wavelength of projected light onto the surface of the magnetic recording medium having a multiplicity of...
5949612 Low friction sliding hard disk drive system  
A operationally contacting hard disk drive system has reduced friction due to lower capillary adhesion between the disk surface and a transducer in a substantially continuous sliding relationship...
5948495 Ceramic-metal matrix composites for magnetic disk substrates for hard disk drives  
A rigid disk substrate for a magnetic recording disk is formed of a ceramic-metal matrix composite. The ceramic-metal matrix composite has a composition ranging from approximately 1 to 40 weight %...
5948092 Local bus IDE architecture for a split computer system  
Described is a personal computer system that includes a first housing coupled to a second housing with a multi-conductor cable. The first housing includes an IDE direct access storage device having...
5945197 Laser texturing of magnetic recording medium using multiple lens focusing  
A magnetic recording medium is textured with a pulsed laser light beam through a multiple lens focusing system. The use of a multiple lens focusing system enables the formation of a plurality of...
5943187 Carbon overcoat for a slider with improved step coverage  
A method is provided for applying an overcoat to a slider and sensitive elements of a magnetic head which has improved coverage, reduced spacing loss and improved corrosion resistance. After...
5939170 Magnetic recording medium  
There is provided a magnetic recording medium comprising a nonmagnetic substrate (10, 20), at least one magnetic layer (30) having an upper surface (30a), and a protection layer (40) made of...
5930091 Magnetic disk having CSS area with concave and convex portions and apparatus containing the same  
In order to provide a magnetic disk apparatus and a magnetic disk which is excellent in reliability and durability, and which enables high density recording, respectively, this invention provides a...
5930073 Magnetic disk including protective layer having surface with magnetic disk including protrusions, and magnetic disk apparatus including the magnetic disk  
There is provided a magnetic disk apparatus comprising: at least one magnetic disk having a magnetic layer and a surface protective layer on a substrate; a magnetic head which faces the magnetic...
5928759 Magnetic recording medium, method of producing the same, and recording and reading-out method  
The disclosure describes a magnetic recording medium having at least a magnetic layer, optionally by means of an under layer, on a non-magnetic substrate, wherein projections formed by irradiation...
5926352 Magnetic disk and a glass substrate for the magnetic disk  
A magnetic disk comprises a glass substrate and a magnetic layer formed on the glass substrate wherein the maximum deflection of a bent portion in the radial direction of the magnetic disk with...
5923511 Directly contactable disk for vertical magnetic data storage  
A disk is described for vertical magnetic data storage, which can be directly contacted by a read/write head, consists of a substrate made of silicon, the surface of which forms a layer of porous...
5920449 Recording head for single layer magnetic film perpendicular magnetization medium  
A recording head for a magnetic medium having a single layer magnetic film having an axis of easy magnetization in a direction inclined from an in-plane direction of the magnetic medium includes a...
5912791 Landing zone design for a magnetic disc  
A data storage disc having an improved landing zone for supporting a head gimbal assembly for takeoff and landing. The improved landing zone having a landing surface formed of a patterned surface...
5909341 Hard disk drive  
A hard disk drive includes a magnetic disk used as a magnetic recording medium, and a magnetic head for applying magnetic fields to the disk to record data and for detecting magnetic fields from...
5902665 Glass substrate for magnetic disks  
A glass substrate for a magnetic disk of the present invention is one in which a laser beam is irradiated on a magnetic recording surface side thereby forming a large number of protrusions thereon...
5902115 Recording medium on which attribute information on the playback data is recorded together with the playback data and a system for appropriately reproducing the playback data using the attribute information  
Karaoke data to be reproduced is stored in an optical disk as a video title set together with management information for managing karaoke data and a video object set. In the video object set, a...
5898553 Magnetic disk and magnetic disk unit  
A magnetic disk unit provided with a magnetic disk, a slider operatively configured and supported on a pivoting arm, a vertical recording magnetic head provided on said slider, and an information...
5897931 Magnetic disk with boron carbide overcoat layer  
A significantly thinner boron carbide overcoat layer is provided for a magnetic disk which has the same durability as thicker prior art overcoat layers for protecting an underlying magnetic layer....
5896241 Plain carbon steel hub for data storage device  
A rotating removable data storage device hub, such as a hub for a micro-floppy magnetic data storage disc, that has a core of plain carbon steel and a primary coating. The hub may also include a...
5879783 Low noise magnetic recording medium and method of manufacturing  
A magnetic recording medium exhibiting low medium noise is formed by depositing a seed layer on a glass or a glass-ceramic substrate and oxidizing the deposited seed layer, under controlled...
5878282 Portable information device and system and method for downloading executable instruction from a computer to the portable information device  
A system is provided to exchange information between a computer and a programmable portable information device (PID) using a standard memory drive, such as a 3.5" disk drive or a PCMCIA port. The...
5875084 Magnetic recording disk having protrusions centered in respective depressions  
A process for creating a "distant bump array" surface texture in a magnetic recording disk for reducing stiction and the disk so textured. The texturing process uses a tightly focused diode-pumped...
5875083 Magnetic disc having planiarized CSS zone  
A magnetic disc has a magnetic recording area on or from which the information may be recorded or reproduced by a recording head loaded on a slider. The magnetic recording area has a data area...
Matches 251 - 300 out of 1104 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >