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. 26, 1986
Filed:
Mar. 02, 1983
Applicant:
Inventors:
Toshiaki Wada, Osaka, JP;
Yoshiaki Katsuyama, Osaka, JP;
Assignee:
Sumitomo Special Metal Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428141 ; 2041 / ; 360110 ; 360120 ; 360122 ; 360125 ; 360126 ; 360127 ; 427128 ; 427129 ; 427131 ; 427132 ; 427355 ; 428426 ; 428446 ; 428450 ; 428694 ; 428699 ; 428701 ; 428900 ; 428472 ;
Abstract
A composite substrate for a thin-film magnetic head comprises a substrate material, and an insulating oxide film formed thereon, and defining a smooth and stress-free surface having a surface roughness not greater than 50 .ANG.. A film of a magnetic material having improved magnetic properties may be formed on the surface of the oxide film.