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:
Mar. 01, 2005
Filed:
Jan. 31, 2002
Kazuhide Kawai, Aichi, JP;
Shunzo Shimai, Chiba, JP;
Makoto Takahashi, Kanagawa, JP;
Hiroaki Shitara, Kanagawa, JP;
Fumio Tokuoka, Kanagawa, JP;
Masahiko Ichishima, Kanagawa, JP;
Takashi Suzuki, Kanagawa, JP;
Toyokazu Matsuyama, Kanagawa, JP;
Hideo Uemoto, Kanagawa, JP;
Kazuhide Kawai, Aichi, JP;
Shunzo Shimai, Chiba, JP;
Makoto Takahashi, Kanagawa, JP;
Hiroaki Shitara, Kanagawa, JP;
Fumio Tokuoka, Kanagawa, JP;
Masahiko Ichishima, Kanagawa, JP;
Takashi Suzuki, Kanagawa, JP;
Toyokazu Matsuyama, Kanagawa, JP;
Hideo Uemoto, Kanagawa, JP;
Toshiba Ceramics Co., Ltd., Tokyo, JP;
Abstract
The ceramic member of this invention is formed on the surfaces of crystal grains with a plurality of protrusions having smaller diameter than that of the crystal grain, said crystal grain composing at least the surface or its vicinity of a dense ceramic base material of purity being 95 wt % or higher. Such ceramic members may be produced by performing the surface of a dense ceramic base material with a corrosion treatment in an acid etchant, the dense ceramic base material having purity of 95 wt % or higher and exceeding 90% of a theoretical density, whereby ceramic grains existing on the surface or its vicinity of the base material are formed on the surface thereof with a plurality of protrusions.