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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Weir; Richard D.
Address:
Agoura Hills, CA
No. of patents:
15
Patents:












Patent Number Title Of Patent Date Issued
6103367 Coating of metal substrate for magnetic recording medium August 15, 2000
A coated metal-substrate disk for magnetic-recording applications is disclosed having a first coating selected from the group consisting of nitrides, carbides, or borides of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, or tungsten, or the group con
5961792 Method for making titanium or titanium-alloy substrate for magnetic-recording media October 5, 1999
An improved magnetic-recording disk and a process for manufacturing magnetic-recording disks are disclosed. Precision cold-rolled titanium or titanium alloy is the substrate for a magnetic-recording disk. The surface of the substrate may be hardened by plasma nitriding, plasma carburizin
5900126 Method for manufacturing austenitic stainless steel substrate for magnetic-recording media May 4, 1999
An improved magnetic-recording disk and a process for manufacturing magnetic-recording disks are disclosed. A precision cold-rolled authentic stainless steel is the substrate for a magnetic-recording disk. The surface of the substrate may be hardened by plasma nitriding, plasma carbu
5855951 Method for making ceramic substrates for magnetic-recording media January 5, 1999
An improved magnetic-recording disk and a process for manufacturing magnetic-recording disks are disclosed. An electrically conductive hard coating is deposited upon a ceramic substrate. This coating can be one from the group including the nitrides, carbides, and borides of titanium,
5811182 Magnetic recording medium having a substrate and a titanium nitride underlayer September 22, 1998
A coated metal substrate disk for magnetic-recording applications is disclosed having a first coating selected from the group consisting of nitrides, carbides, or borides of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, or tungsten, or the group con
5707705 Titanium or titanium-alloy substrate for magnetic-recording media January 13, 1998
An improved magnetic-recording disk and a process for manufacturing magnetic-recording disks are disclosed. Precision cold-rolled titanium or titanium alloy is the substrate for a magnetic-recording disk. The surface of the substrate may be hardened by plasma nitriding, plasma carburizin
5681635 Magnetic recording medium having a ceramic substrate, an underlayer having a dense fibrous zone October 28, 1997
An improved magnetic-recording disk and a process for manufacturing magnetic-recording disks are disclosed. An electrically conductive hard coating is deposited upon a ceramic substrate. This coating can be one from the group including the nitrides, carbides, and borides of titanium,
5635269 Precision-etched textured stop/start zone for magnetic-recording disks June 3, 1997
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 is disclosed herein. The metal substrate disk further has a smooth annular second surfa
5626920 Method for coating metal disc substrates for magnetic-recording media May 6, 1997
A coated metal-substrate disk for magnetic-recording applications is disclosed having a first coating selected from the group consisting of nitrides, carbides, or borides of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, or tungsten, or the group con
5624725 Protective overcoatings for magnetic-recording disks April 29, 1997
A sputter-deposited wear-resistant protective coating for magnetic-recording alloy thin films is disclosed. The protective coating includes a protective layer and an interfacial adhesion layer. The protective layer is preferably titanium diboride or amorphous nitrided carbon, and the
5536549 Austenitic stainless steel substrate for magnetic-recording media July 16, 1996
An improved magnetic-recording disk and a process for manufacturing magnetic-recording disks are disclosed. A precision cold-rolled austenitic stainless steel is the substrate for a magnetic-recording disk. The surface of the substrate may be hardened by plasma nitriding, plasma carb
5490910 Circularly symmetric sputtering apparatus with hollow-cathode plasma devices February 13, 1996
A sputtering apparatus for depositing thin films on substrates is disclosed, which includes a process chamber having a central sputtering region and an annular plasma distribution region surrounding and open to the central sputtering region, a planar disk diode positioned in the cent
5457298 Coldwall hollow-cathode plasma device for support of gas discharges October 10, 1995
A hollow-cathode plasma device includes a hollow chamber composed of an electrically conductive material with a gas inlet at one end and a plasma outlet at an opposite end, a multipolar magnet array surrounding a portion of the chamber for isolating the plasma from the walls of the chamb
5453168 Method for forming protective overcoatings for metallic-film magnetic-recording mediums September 26, 1995
A sputter-deposited wear-resistant protective coating for magnetic-recording alloy thin films is disclosed. The protective coating includes a protective layer and an interfacial adhesion layer. The protective layer is preferably titanium diboride or amorphous nitrided carbon, and the
5232569 Circularly symmetric, large-area, high-deposition-rate sputtering apparatus for the coating of d August 3, 1993
Disclosed is a sputtering apparatus and method for deposition of a film on a substrate with means for exciting a plasma by ultrahigh radio frequency or microwave at the electron cyclotron resonance to create a region of plasma which is devoid of magnetic field and at least one high-radio










 
 
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