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. 01, 2012
Filed:
Sep. 23, 2008
Yoshitaka Sasaki, Santa Clara, CA (US);
Hiroyuki Ito, Milpitas, CA (US);
Takehiro Kamigama, Shatin, CN;
Tatsushi Shimizu, Hong Kong, CN;
Hironori Araki, Milpitas, CA (US);
Shigeki Tanemura, Santa Clara, CA (US);
Kazuo Ishizaki, Milpitas, CA (US);
Yoshitaka Sasaki, Santa Clara, CA (US);
Hiroyuki Ito, Milpitas, CA (US);
Takehiro Kamigama, Shatin, CN;
Tatsushi Shimizu, Hong Kong, CN;
Hironori Araki, Milpitas, CA (US);
Shigeki Tanemura, Santa Clara, CA (US);
Kazuo Ishizaki, Milpitas, CA (US);
Headway Technologies, Inc., Milpitas, CA (US);
SAE Magnetics (H. K.) Ltd., Hong Kong, CN;
Abstract
A thin-film magnetic head including a main magnetic pole layer having a magnetic pole end part on a side of a medium-opposing surface opposing a recording medium; a write shield layer opposing the magnetic pole end part to form a recording gap layer on the medium-opposing surface side; a thin-film coil wound about the write shield layer or the main magnetic pole layer; and a base insulating layer formed with a magnetic pole forming depression, including a very narrow groove defining a form of the magnetic pole end part and a main depression integrally extending from an end part of the very narrow groove remote from the medium-opposing surface. A stepped part is formed at a boundary between a bottom face of the main depression and a bottom face of the very narrow groove. The main magnetic pole layer is the only magnetically functional layer in the depression.