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:
Aug. 17, 1993
Filed:
Jun. 13, 1991
Applicant:
Inventors:
Makoto Yoshida, Tokyo, JP;
Yuzuru Iwai, Tokyo, JP;
Noboru Yamanaka, Tokyo, JP;
Jun Shouzi, Tokyo, JP;
Tsutomu Koyanagi, Tokyo, JP;
Mikio Matsuzaki, Tokyo, JP;
Nobuya Ohyama, Tokyo, JP;
Yoshiaki Tanaka, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
427 96 ; 427130 ; 427131 ;
Abstract
A method of producing a thin film magnetic head comprises forming a thin film magnetic circuit including a magnetic film and a conductive coil film on a substrate, and heating the thin film magnetic circuit at a temperature in a range of from 270.degree. C. to 400.degree. C. before forming a protective layer covering the thin film magnetic circuit.