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. 13, 2001
Filed:
Sep. 09, 1998
Applicant:
Inventor:
Tetsuya Mino, Chiba, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/147 ; G11B 5/127 ;
U.S. Cl.
CPC ...
G11B 5/147 ; G11B 5/127 ;
Abstract
A thin-film magnetic head includes an ABS and a three-layer pole tip structure located between the ABS and a position at a predetermined height from the ABS. The structure consists of a first pole, a recording gap layer and a second pole. The recording gap layer is made of a material having a etching rate equal to or higher than that of a material for making the first and second poles.