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:
Oct. 05, 2004
Filed:
Feb. 05, 2002
Applicant:
Inventors:
Naruaki Oki, Niigata-ken, JP;
Sumihito Morita, 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 metal film is formed on the upper surface of a gap-depth defining layer. This makes it possible to form an upper magnetic layer with a predetermined thickness over a gap layer and the metal film by plating, and to produce a thin-film magnetic head which can reduce the magnetic saturation. The positions of a rear edge of the upper magnetic layer or the like, which contributes to the characteristics, such as overwriting characteristics, can be easily and freely changed in order to optimize the characteristics, and the controllability of the track width can be enhanced.