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:
Dec. 06, 2011
Filed:
Apr. 17, 2008
Mitsuo Kawasaki, Tokyo, JP;
Kiyoshi Kobayashi, Tokyo, JP;
Tomoo Otsuka, Tokyo, JP;
Hironori Namba, Tokyo, JP;
Yusuke Kanekuni, Tokyo, JP;
Mitsuo Kawasaki, Tokyo, JP;
Kiyoshi Kobayashi, Tokyo, JP;
Tomoo Otsuka, Tokyo, JP;
Hironori Namba, Tokyo, JP;
Yusuke Kanekuni, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A thin-film magnetic head comprises a reproducing element formed on an undercoat film on a head substrate surface, a recording element formed on the upper side of the reproducing element, and a heater formed on the upper or lower side of the reproducing element, the heater generating heat upon energization so as to project at least the reproducing element by thermal expansion toward a recording medium. A shield layer is formed between the reproducing element and the heater by a plurality of layers including at least first and second shield layers. In the first and second shield layers, the second upper shield layer located closer to the heater is formed by a material having a coefficient of thermal expansion smaller than that of the first shield layer located closer to the reproducing element.