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:
May. 04, 2004
Filed:
Jan. 04, 2001
Applicant:
Inventors:
Assignee:
Alps Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/147 ;
U.S. Cl.
CPC ...
G11B 5/147 ;
Abstract
In a thin-film magnetic head, an lower magnetic pole layer is formed on a lower core layer to form a step between the lower core layer and the lower magnetic pole layer. A coil layer and a coil-insulating layer are formed on the lower core layer, and an upper core layer is formed over the lower magnetic pole layer and the coil-insulating layer. This configuration decreases the height of the coil-insulating layer from the lower magnetic pole layer compared to the height in a conventional thin-film magnetic head. The front end of the upper core layer can be precisely formed so as to have a track width Tw. This thin-film magnetic head is suitable for narrower track widths.