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:
Mar. 25, 2003
Filed:
Jun. 27, 2000
Applicant:
Inventors:
Toshinori Watanabe, Niigata-ken, JP;
Mitsuo Kawasaki, Niigata-ken, JP;
Assignee:
Alps Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/147 ;
U.S. Cl.
CPC ...
G11B 5/147 ;
Abstract
A high-specific-resistance layer is formed on a soft magnetic layer of an upper core layer in a thin-film magnetic head. The high-specific-resistance layer has a specific resistance which is higher than the specific resistance of the softer magnetic layer. This high-specific-resistance layer can reduce eddy current loss which is generated as the recording frequency increases. The thin-film magnetic head is suitable for high recording frequencies.