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:
Jun. 13, 2006
Filed:
Sep. 18, 2003
Shigekazu Ohtomo, Fujisawa, JP;
Hiroshi Fukui, Fujisawa, JP;
Sunao Yonekawa, Fujisawa, JP;
Yoji Maruyama, Fujisawa, JP;
Tadayuki Iwakura, Fujisawa, JP;
Shigekazu Ohtomo, Fujisawa, JP;
Hiroshi Fukui, Fujisawa, JP;
Sunao Yonekawa, Fujisawa, JP;
Yoji Maruyama, Fujisawa, JP;
Tadayuki Iwakura, Fujisawa, JP;
Hitachi Global Storage Technologies Japan, Ltd., Odawara, JP;
Abstract
A magnetic material having a low coefficient of thermal expansion of 11.5×10/K or less is used for forming at least one of a lower shield or an upper shield. A laminated film comprising a layer of the magnetic material having a low coefficient of thermal expansion of 11.5×10/K or less, and an 80 wt % NiFe alloy layer, is used for forming at least one of the lower shield and the upper shield. Thus, the thin film magnetic head having reduced after-record noise and reduced thermal protrusion can be obtained.