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. 07, 1999
Filed:
Dec. 01, 1997
Kazuhiro Saito, Yokohama, JP;
Hiromi Fuke, Kawasaki, JP;
Hitoshi Iwasaki, Yokosuka, JP;
Yuzo Kamiguchi, Yokohama, JP;
Masashi Sahashi, Yokohama, JP;
Hiroaki Kawashima, Saku, JP;
Taro Oike, Saku, JP;
Koichi Terunuma, Hoya, JP;
Haruyuki Morita, Komoro, JP;
Kabushiki Kaisha Toshiba, , JP;
TDK Corporation, , JP;
Abstract
A magnetoresistance effect head comprises a giant magnetoresistance effect film, a pair of leads to supply an electric current to the giant magnetoresistance effect head, and upper and lower magnetic shielding layers made of a crystalline soft magnetic film and disposed to hold the giant magnetoresistance effect film therebetween with a magnetic gap film intervened, wherein the surface roughness of an under layer of the giant magnetoresistance effect film is determined so that a center period L of the surface roughness satisfies L>70 nm.