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:
Jun. 23, 1998
Filed:
Jan. 10, 1997
Applicant:
Inventors:
Eiji Nakamura, Saitama, JP;
Toshiaki Ueda, Ibaragi-ken, JP;
Takashi Yamada, Ibaragi-ken, JP;
Takatoshi Oshika, Saitama, JP;
Assignee:
Mitsubishi Materials Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
427255 ; 4272551 ; 4272553 ;
Abstract
A method of preparing a coated cutting tool is provided involving formation of a hard coating layer including an aluminum oxide layer to an average layer thickness of 3-20 microns on the surface of a cutting tool substrate using chemical vapor deposition and/or physical vapor deposition, to give a coated cutting tool excellent in chipping resistance, where the aluminum oxide layer is formed from an inert gas type reaction gas containing aluminum chloride and nitrogen oxides, and optionally titanium tetrachloride, nitrogen and hydrogen, in an inert carrier gas.