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:
Feb. 26, 2008
Filed:
Aug. 15, 2005
Tomohiro Yamashita, Niigata-ken, JP;
Akira Takahashi, Niigata-ken, JP;
Shuji Yanagi, Niigata-ken, JP;
Tomohiro Yamashita, Niigata-ken, JP;
Akira Takahashi, Niigata-ken, JP;
Shuji Yanagi, Niigata-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A magnetic head contains a write magnetic head and a read magnetic head. The write magnetic head includes a lower core layer, an upper core layer arranged over the lower core layer, and a coil layer for applying a magnetic field to the lower and upper core layers. The read magnetic head includes an upper shield layer, a lower shield layer, and a reproducing device arranged between the upper shield layer and the lower shield layer. The upper shield layer has a dimension A in a direction of track width and a dimension B in a direction of height and has an aspect ratio B/A ranging from 0.6 to 1.2. The dimension A ranges from 75 μm to 150 μm.