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. 28, 2008
Filed:
Dec. 15, 2005
Katsumichi Tagami, Tokyo, JP;
Tatsuya Harada, Tokyo, JP;
Hiroki Matsukuma, Tokyo, JP;
Tetsuya Roppongi, Tokyo, JP;
Susumu Aoki, Tokyo, JP;
Kazumasa Fukuda, Tokyo, JP;
Naoto Matono, Nagano, JP;
Katsumichi Tagami, Tokyo, JP;
Tatsuya Harada, Tokyo, JP;
Hiroki Matsukuma, Tokyo, JP;
Tetsuya Roppongi, Tokyo, JP;
Susumu Aoki, Tokyo, JP;
Kazumasa Fukuda, Tokyo, JP;
Naoto Matono, Nagano, JP;
TDK Corporation, Tokyo, JP;
SAE Magnetics (H.K.) Ltd., Shatin, N.T., HK;
Abstract
A thin-film magnetic head with which an error rate is decreased due to a reduction of a jitter without significant decrease in write field, is provided. The head comprises at least one inductive write head element comprising: a main magnetic pole layer having an inner saturation magnetic flux density varying from both side end surfaces in a track-width direction and a leading end surface, toward a center portion in the track-width direction of a trailing end surface; an auxiliary magnetic pole layer; and at least one coil layer, a curvature width Wof a contour line of a write field adjacent to a trailing edge on an ABS side of the main magnetic pole layer satisfying the following expression: −0.15*W≦W<12 where Wis a track width and a unit of Wand Wis nanometer.