Elsie Yang Chuang

US Patent:

6340521, Jan 22, 2002

Filed:

Nov 9, 1999

Appl. No.:

09/436495

Inventors:

Phuong Nguyen - Milpitas CA
Thanh Ha - San Jose CA
Elsie Yang Chuang - Cupertino CA

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 572

US Classification:

428336, 428408, 428694 TC, 428694 TP, 428689, 428702, 428900, 427131, 20419215, 20419216

Abstract:

A magnetic medium is formed with a barrier layer between the magnetic layer and protective overcoat to prevent degradation of magnetic properties during deposition of the protective overcoat due to poisoning effects by reactive gases on the magnetic layer. Embodiments include sputter depositing a Cr or Cr alloy barrier layer, having a thickness of about 5 to about 25 , on a magnetic layer and sputter depositing a protective overcoat containing carbon and nitrogen on the barrier layer in a nitrogen-containing environment.

US Patent:

61399817, Oct 31, 2000

Filed:

Sep 14, 1998

Appl. No.:

9/152324

Inventors:

Elsie Yang Chuang - Saratoga CA
Phuong Nguyen - Milpitas CA
Qixu David Chen - Milpitas CA
Xing Song - Fremont CA
Charles Leu - Fremont CA
Thanh Thien Ha - San Jose CA

Assignee:

Seagate Technology, Inc. - Scotts Valley CA

International Classification:

G11B 566

US Classification:

428694T

Abstract:

Adhesion between a deposited seed layer, e. g. , a sputter-deposited NiP seed layer, on an alternate substrate, such as a glass, ceramic or glass-ceramic substrate, is significantly enhanced by depositing a chromium or chromium-alloy adhesion enhancement film between the substrate and seed layer. Magnetic recording media comprising a surface-oxidized NiP seed layer and chromium adhesion enhancement film exhibit low media noise and are suitable for high density longitudinal magnetic recording.