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:
Apr. 17, 2001
Filed:
Jan. 03, 1997
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/31 ; G11B 5/187 ;
U.S. Cl.
CPC ...
G11B 5/31 ; G11B 5/187 ;
Abstract
A thin-film magnetic head in which the end face of a magnetic film protrudes beyond a substrate within the air bearing surface of the magnetic head. The magnetic film being made of a material containing a metallic element which is lap polished with abrasive grains containing the hydroxide of the metallic element. Because the air bearing surface is constructed according to the above procedure, the bit length of a magnetic disk can be decreased to ensure a higher record density.