U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Quotables

"We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology."

Carl Sagan

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 428/833 - Single magnetic layer with plural overcoat layers


Subclass of Class 428 - Stock material or miscellaneous articles
Definition: Subject matter in which the medium includes a single
No. of patents: 26
Last issue date: 05/01/2012


NumberTitleIssue Date
8168311Magnetic recording disk having pre-patterned surface features and planarized surface
A magnetic recording disk with pre-patterned surface features of elevated lands and recessed grooves or trenches, like a discrete-track media (DTM) or bit-patterned media (BPM) disk, has a planarized surface. A multilayered disk overcoat is used to protect the recor...
05/01/2012
8043734Oxidized conformal capping layer
The invention relates to granular perpendicular magnetic recording media with a capping layer comprised of a material having high surface mobility and low surface energy. The capping layer surface is oxidized to produce a passivating surface that is impervious to co...
10/25/2011
7740961Magnetic recording medium
A magnetic recording media has recording cells formed of two-dimensionally arrayed magnetic material, a nonmagnetic layer surrounding the recording cells, an adhesive film formed on each of the recording cells, and a lubricant directly adhered to the adhesive film.
06/22/2010
7501192Recording medium including protection layer having unequal property
A first protection layer is overlaid on the surface of a recording layer in a recording medium. A second protection layer is overlaid on the surface of the recording layer at a position adjacent the first protection layer. The second protection layer has a compositi...
03/10/2009
7277254Magnetic recording disk and process for manufacture thereof
A magnetic recording disk having a substrate, a magnetic layer formed on the substrate, a protective layer formed on the magnetic layer and a lubricant layer formed on the protective layer, the lubricant layer containing a perfluoropolyether compound having an end m...
10/02/2007
7252897Magnetic recording disk and process for manufacture thereof
A magnetic recording disk having a substrate, a magnetic layer formed on the substrate, a protective layer formed on the magnetic layer and a lubricant layer formed on the protective layer, the lubricant layer containing a perfluoropolyether compound having an end m...
08/07/2007
7092199Magnetic tape and magnetic tape cartridge
A magnetic tape which is run at a speed of 4 m/sec. or higher and has recording tracks with a width of 21 μm or less, and which includes a non-magnetic support, at least one magnetic layer formed on one surface of the non-magnetic support, and a backcoat layer form...
08/15/2006
7074693Plasma spraying for joining silicon parts
A method of joining two silicon members and the bonded assembly in which the members are assembled to place them into alignment across a seam. Silicon derived from silicon powder is plasma sprayed across the seam and forms a silicon coating that bonds to the silicon...
07/11/2006
7061728High linear density read head with a contiguous junction and minimal shield shorts
In a magnetic head a read sensor is located between first and second read gap layers wherein the first read gap layer includes a read gap material layer and first and second refill gap layers. The read gap material layer has first and second depressions which extend...
06/13/2006
6641890Cartridge-contained recording medium
In a magneto-optical disc contained in a cartridge, a first dielectric layer, signal recording layer, second dielectric layer, and light reflecting layer are sequentially stacked on a substrate having formed grooves, and a first protective layer, print la...
11/04/2003
5536577Magnetic recording medium comprising a protective layer and a lubricant layer which contains a host multidentate ligand and a guest reversibly trapped lubricant
The lubricant layer according to the present invention is used in a thin film magnetic recording medium in which a solid surface sliding at a high speed is required to retain its lubricating performance and abrasion resistance for a long period of time, c...
07/16/1996
5489480Magnetic recording medium and process for producing the same
Disclosed is a process for producing a magnetic recording medium comprising subjecting a ferromagnetic metal thin film formed on a non-magnetic support by vacuum film formation to a high humidity treatment in an atmosphere of from 50 to 90% RH at a temper...
02/06/1996
5178954Magnetic recording medium having a metallic magnetic thin film layer, a primer layer comprising an amino alkoxysilane and a lubricant layer comprising a functional perfluoropolyether
A two-layer protective coating covers a metallic thin film magnetic recording medium of a magnetic recording element. The two-layer protective coating comprises a primer layer proximal to the metallic thin film magnetic recording medium. The primer layer ...
01/12/1993
5080971Magnetic recording medium
In a magnetic recording medium wherein a metal thin film magnetic layer and an overcoat are formed on a nonmagnetic substrate, durability is improved when the overcoat comprises a plasma-polymerized film and a topcoat of an organic fluorine compound; a pl...
01/14/1992
5069967Magnetic recording medium
In a magnetic recording medium wherein a metal thin film magnetic layer and an overcoat are formed on a nonmagnetic substrate, durability is improved when the overcoat comprises a plasma-polymerized film and a topcoat of an organic fluorine compound; a pl...
12/03/1991
5049410Lubricant film for a thin-film disk
A lubricant film for a thin-film disk is disclosed. The lubricant film comprises a monolayer of fixed lubricant bonded to the surface of the thin-film disk and a mobile lubricant in contact with the layer of fixed lubricant. The monolayer of lubricant fil...
09/17/1991
4849305Magnetic recording medium
Herein disclosed is an improved magnetic recording medium which comprises a substrate, a magnetic recording layer, if necessary, a protective layer, an adhesion promoting layer and a lubricant layer, respectively applied or deposited on the substrate in t...
07/18/1989
4680218Magnetic recording medium
A magnetic recording medium comprises a base, a magnetic layer made of a magnetic material and formed on the base, a lubricant layer made of a lubricant material having lubricity and formed on the magnetic layer, and a corrosion resisting layer made of a ...
07/14/1987
4664978Methods of modifying polymeric surfaces and articles produced thereby
This invention relates to an improved process to produce composite polymeric materials and an article having an adherent surface layer. More specifically, the invention describes a process for producing a modifying adherent layer on a passive polymeric ma...
05/12/1987
4601950Magnetic recording medium and manufacturing method thereof
A manufacturing method for a magnetic recording medium is disclosed which comprises the steps of forming a metallic magnetic layer on a non-magnetic substrate such as a polyester film with or without a non-magnetic metal layer deposited thereon by a metho...
07/22/1986
4529659Magnetic recording member and process for manufacturing the same
Magnetic recording member having a magnetic storage layer covered by composite overlaying layers including an intermediate layer and a lubricant layer. The thin intermediate layer is formed by coating an aminosilane or epoxysilane compound directly or ind...
07/16/1985
4521482Magnetic recording medium
A magnetic recording medium having a layer of an organic polymer formed on an oblique vapor deposited magnetic metal film is disclosed. A layer of a higher aliphatic acid and/or an ester thereof is also formed on said polymer layer....
06/04/1985
4404247Protective covering for magnetic recording medium
Magnetic recording medium protected by an ultra-thin, composite low surface energy covering provided by an inner layer of insoluble polymer and an outer layer of insoluble polymer which are made by in situ polymerization. The inner layer is made from two ...
09/13/1983
4188434Lubricant for a magnetic member
A magnetic record, such as a magnetic disc, has a smooth continuous layer of solid lubricant mixed with liquid lubricant. The lubricating layer is applied by spraying the magnetic record with a carrier in which the solid and liquid lubricants are dissolve...
02/12/1980
4074016Magnetic record carrier
A record carrier for a magnetic thin film metal layer includes a substrate coated with a pigmented epoxy resin as a synthetic substance layer. The pigment includes approximately 20% titanium dioxide and approximately 2% aluminum oxide. A thin getter metal...
02/14/1978
4069360Magnetic record member and process for manufacturing the same
Magnetic storage means which may be a disc having a magnetic storage layer coated with a protective layer. The protective layer, which is preferably an inorganic oxide material, protects the magnetic storage layer from corrosion. A lubricant is applied to...
01/17/1978
 
Sign InRegister
Username  
Password   
forgot password?