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. 11, 2010
Filed:
Feb. 27, 2007
Kazuhiko Maejima, Chuo-ku, JP;
Makoto Hasegawa, Chuo-ku, JP;
Atsuhiro Nonaka, Chuo-ku, JP;
Hiroshi Kamiyama, Chuo-ku, JP;
Teruhisa Shindo, Chuo-ku, JP;
Hiroshi Yamazaki, Chuo-ku, JP;
Kazuhiko Maejima, Chuo-ku, JP;
Makoto Hasegawa, Chuo-ku, JP;
Atsuhiro Nonaka, Chuo-ku, JP;
Hiroshi Kamiyama, Chuo-ku, JP;
Teruhisa Shindo, Chuo-ku, JP;
Hiroshi Yamazaki, Chuo-ku, JP;
TDK Corporation, Tokyo, JP;
Abstract
A manufacturing method of a thin-film head includes the steps of, laminating and patterning a soft magnetic layer with iron alloy that contains silicon and aluminum through a base layer on a substrate; laminating an insulating layer on the patterned soft magnetic layer; performing a chemical-mechanical polishing of a surface of the laminated insulating layer and the patterned soft magnetic layer with a first acid slurry; forming a lower shield layer by a mechanical polishing with a second weak acid, or neutral slurry with a pH different from that of the first slurry; and forming a lower shield gap layer and a magnetoresistive effect layer on the lower shield layer.