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. 24, 2011
Filed:
Dec. 30, 2008
Toshiyuki Ayukawa, Tokyo, JP;
Shinji Hara, Tokyo, JP;
Daisuke Miyauchi, Tokyo, JP;
Takahiko Machita, Tokyo, JP;
Yoshihiro Tsuchiya, Tokyo, JP;
Toshiyuki Ayukawa, Tokyo, JP;
Shinji Hara, Tokyo, JP;
Daisuke Miyauchi, Tokyo, JP;
Takahiko Machita, Tokyo, JP;
Yoshihiro Tsuchiya, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A method for manufacturing a thin film magnetic head includes a step for forming an MR layered body; a step for forming a first sacrificial layer made of material removable by wet etching, and subsequently, forming a cap layer on the upper surface of the first sacrificial layer; further, a step for patterning the MR layered body and the cap layer and then filling part of the removed areas of the MR layered body and the cap layer with a bias magnetic layer and the remaining with insulating layers; a step for removing the cap layer by dry etching and, subsequently, removing the first sacrificial layer by wet etching; and a step for forming a second shield layer above the MR layered body and the bias magnetic layer.