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. 13, 2011
Filed:
Nov. 21, 2007
Norikazu Nakamura, Kawasaki, JP;
Hiroshi Chiba, Kawasaki, JP;
Yoshiharu Kasamatsu, Kawasaki, JP;
Takayuki Musashi, Kawasaki, JP;
Yukiko Oshikubo, Kawasaki, JP;
Tsukasa Itani, Kawasaki, JP;
Norikazu Nakamura, Kawasaki, JP;
Hiroshi Chiba, Kawasaki, JP;
Yoshiharu Kasamatsu, Kawasaki, JP;
Takayuki Musashi, Kawasaki, JP;
Yukiko Oshikubo, Kawasaki, JP;
Tsukasa Itani, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A head slider that can furnish excellent head flying stability and a magnetic recording device having excellent head flying stability are provided. For the head slider, the protective layer is composed of two layers, that is, a lower layer and an upper layer thereon; the ionization potential of the lower layer is made to be smaller than that of the upper layer; and the surface free energy of the upper layer is made to be 45 mN/m or less.