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:
Oct. 14, 2008
Filed:
Nov. 09, 2006
Takeshi Ishikawa, Chiba-ken, JP;
Takeshi Ishikawa, Chiba-ken, JP;
Hitachi Tool Engineering, Ltd., Tokyo, JP;
Abstract
A hard film formed by an arc-discharge ion-plating method, having a composition comprising metal components represented by AlCrSi, wherein x and y are respectively atomic ratios meeting 0.45≦x≦0.75, 0≦y≦0.35, and 0.5≦x+y<1, and non-metal components represented by NBCO, wherein α, β and γ are respectively atomic ratios meeting 0 ≦α≦0.15, 0≦β≦0.35, and 0.003≦γ≦0.25, the hard film having an NaCl-type crystal structure, with a half width of 2θ at an X-ray diffraction peak corresponding to a (111) face or a (200) face being 0.5-2.0°, and the hard film containing oxygen more in grain boundaries than in crystal grains.