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:
Aug. 30, 2011
Filed:
Jan. 13, 2009
Takayasu Kanaya, Tokyo, JP;
Kei Hirata, Tokyo, JP;
Yohei Koyanagi, Tokyo, JP;
Seiichi Takayama, Tokyo, JP;
Shinji Hara, Tokyo, JP;
Toshiyuki Ayukawa, Tokyo, JP;
Takayasu Kanaya, Tokyo, JP;
Kei Hirata, Tokyo, JP;
Yohei Koyanagi, Tokyo, JP;
Seiichi Takayama, Tokyo, JP;
Shinji Hara, Tokyo, JP;
Toshiyuki Ayukawa, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
Foundation layers of a thin film magnetic head are disposed between insulating layers and bias magnetic field application layers, and are configured of Cr or Cr alloy. The insulating layers are configured of a Si oxide such that the Si content of the Si oxide is in the range of 30˜56 at % (atom %) and that the atom ratio of oxygen to Si (O/Si) is in the range of 0.8˜1.3. With the configuration, the occurrence rate of noise is reduced.