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. 06, 1991
Filed:
May. 22, 1989
Applicant:
Inventors:
Shinichi Okuyama, Nagaoka, JP;
Kouji Yamazaki, Nagaoka, JP;
Koichi Yaba, Nagaoka, JP;
Kazuhiko Watanuki, Nagaoka, JP;
Akio Kishimoto, Nagaoka, JP;
Ken Toyoshima, Nagaoka, JP;
Akira Sato, Kanazawa, JP;
Assignee:
Alps Electric Co., Ltd., Tokyo, US;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
264 60 ; 264 66 ; 264 67 ;
Abstract
A core slider for a magnetic head is disclosed, in which occurrence of the grain detachment from the slider due to microcracks produced at the fabrication of the slider is reduced by forming a hematite thin film on the surface portion of the core slider.