Richard A Weir

US Patent:

61033677, Aug 15, 2000

Filed:

Apr 23, 1998

Appl. No.:

9/065332

Inventors:

Richard D. Weir - Agoura Hills CA
Carl W. Nelson - Santa Cruz CA

Assignee:

Tulip Memory Systems, Inc. - Fremont CA

International Classification:

B32B 514
B32B 1504
B32B 1520
B32B 1800
G11B 562

US Classification:

428336

Abstract:

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 consisting of aluminum nitride, silicon nitride, or silicon carbide on the metal substrate and a magnetic-recording material coating on the first coating. The first coatings are applied by evaporative reactive ion plating or by reactive sputtering.

US Patent:

56269200, May 6, 1997

Filed:

Apr 21, 1995

Appl. No.:

8/427975

Inventors:

Richard D. Weir - Agoura Hills CA
Carl W. Nelson - Santa Cruz CA

Assignee:

Tulip Memory Systems, Inc. - Fremont CA

International Classification:

C23C 1406
C23C 1408
C23C 1432
B05D 512

US Classification:

427530

Abstract:

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 consisting of aluminum nitride, silicon nitride, or silicon carbide on the metal substrate and a magnetic-recording material coating on the first coating. The first coatings are applied by evaporative reactive ion plating or by reactive sputtering.

US Patent:

56352697, Jun 3, 1997

Filed:

Jan 19, 1995

Appl. No.:

8/375246

Inventors:

Richard D. Weir - Agoura Hills CA
Carl W. Nelson - Hayward CA
Neil D. Heiman - Morgan Hill CA

Assignee:

Tulip Memory Systems, Inc. - Fremont CA

International Classification:

G11B 566

US Classification:

428 653

Abstract:

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 surface area between the first surface area's outer diameter and the metal substrate's circumferential edge. The textured annular first surface area has a laser-etched circular pattern. Furthermore the metal disk substrate of an aluminum alloy, a titanium alloy, or an austenitic stainless steel has a thin-film coating selected from the group consisting of nitrides, carbides, or borides of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum or tungsten.

US Patent:

58111824, Sep 22, 1998

Filed:

Oct 4, 1991

Appl. No.:

7/771348

Inventors:

Richard D. Weir - Agoura Hills CA
Carl W. Nelson - Santa Cruz CA

Assignee:

Tulip Memory Systems, Inc. - Fremont CA

International Classification:

G11B 566

US Classification:

428336

Abstract:

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 consisting of aluminum nitride, silicon nitride, or silicon carbide on the metal substrate and a magnetic-recording material coating on the first coating. The first coatings are applied by evaporative reactive ion plating or by reactive sputtering.