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:
Sep. 01, 2009
Filed:
May. 13, 2005
Tsuyoshi Umehara, Tokyo, JP;
Norikazu Ota, Tokyo, JP;
Katsumichi Tagami, Tokyo, JP;
Hiroki Matsukuma, Tokyo, JP;
Nobuya Oyama, Tokyo, JP;
Soji Koide, Tokyo, JP;
Yoshiyuki Mizoguchi, Tokyo, JP;
Kazuhide Yamada, Tokyo, JP;
Tsuyoshi Umehara, Tokyo, JP;
Norikazu Ota, Tokyo, JP;
Katsumichi Tagami, Tokyo, JP;
Hiroki Matsukuma, Tokyo, JP;
Nobuya Oyama, Tokyo, JP;
Soji Koide, Tokyo, JP;
Yoshiyuki Mizoguchi, Tokyo, JP;
Kazuhide Yamada, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A thin-film magnetic head according to the present invention comprises: a substrate; at least one magnetic head element formed on the substrate; an overcoat multilayer composed of a plurality of overcoat layers, formed on the substrate so as to cover the at least one magnetic head element; and at least one heating element to be heated at least during operation of the at least one magnetic head element, the at least one heating element provided in the overcoat multilayer, and a coefficient of thermal expansion of an overcoat layer located farthest from the substrate in the overcoat multilayer being smaller than a coefficient of thermal expansion of an overcoat layer located closest to the substrate in the overcoat multilayer.