The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 2004
Filed:
Nov. 20, 2001
Applicant:
Inventors:
Hiromu Chiba, Toyko, JP;
Kenji Furusawa, Tokyo, JP;
Toshio Tamura, Tokyo, JP;
Yuji Ochiai, Tokyo, JP;
Assignee:
Hitachi Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/60 ; G11B 1/564 ; G11B 1/732 ; G11B 2/120 ;
U.S. Cl.
CPC ...
G11B 5/60 ; G11B 1/564 ; G11B 1/732 ; G11B 2/120 ;
Abstract
A magnetic head is formed of materials having different hardnesses. The head includes a base coat formed on a substrate having a high hardness, for example alumina titanium carbide, upon which a base coat, for example alumina, is formed. The base coat typically had a thickness in the range of 0.05 to 0.5 &mgr;m. This structure provides an improved flying height for heads manufactured using a lapping process.