Daravuth I Seng

US Patent:

20030059649, Mar 27, 2003

Filed:

Aug 16, 2002

Appl. No.:

10/222420

Inventors:

George Saliba - Northboro MA, US
Satya Mallick - Milford MA, US
Daravuth Seng - Dudley MA, US
Geon Choe - Northboro MA, US

Assignee:

Quantum Corporation, a California corporation

International Classification:

G11B005/735

US Classification:

428/6940BB

Abstract:

A magnetic tape comprises a substrate having on one side thereof a magnetic layer serving as a recording surface, and on the other side thereof at least two layers containing inorganic particles which serve as a non-recording surface, wherein said magnetic tape has a region on the side of the non-recording surface along the longitudinal direction of the tape in which a regular pattern for servo tracking having different optical properties from the other major region of the side of the non-recording surface is or can be formed. The layers on the non-recording surface are characterized in that the inorganic particles in the outermost layer are larger than the inorganic particles in the underlying layer(s).

US Patent:

20030203240, Oct 30, 2003

Filed:

Apr 24, 2002

Appl. No.:

10/131052

Inventors:

Daravuth Seng - Dudley MA, US
Plamen Stoyanov - Milford MA, US
Lawrence Neumann - Lancaster MA, US

International Classification:

G11B005/66

US Classification:

428/6940BB, 428/69400R

Abstract:

A magnetic tape includes a substrate having disposed on opposite sides thereof a magnetic-layered recording surface and a non-recording surface containing a magnetic servo tracking pattern, the non-recording surface including two layers, an outer layer containing inorganic particles and an inner layer containing magnetic particles.

US Patent:

6558774, May 6, 2003

Filed:

Aug 17, 1999

Appl. No.:

09/376118

Inventors:

George A. Saliba - Northboro MA
Satya Mallick - Milford MA
Daravuth Seng - Dudley MA
Geon Choe - Northboro MA

Assignee:

Quantum Corporation - Milpitas CA

International Classification:

G11B 5735

US Classification:

428156, 428323, 428694 TB, 428694 BB, 369 4411, 3692754, 369277, 369279

Abstract:

A magnetic tape comprises a substrate having on one side thereof a magnetic layer serving as a recording surface, and on the other side thereof at least two layers containing inorganic particles which serve as a non-recording surface, wherein said magnetic tape has a region on the side of the non-recording surface along the longitudinal direction of the tape in which a regular pattern for servo tracking having different optical properties from the other major region of the side of the non-recording surface is or can be formed. The layers on the non-recording surface are characterized in that the inorganic particles in the outermost layer are larger than the inorganic particles in the underlying layer(s).