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. 18, 1990
Filed:
Dec. 09, 1988
Applicant:
Inventors:
Assignee:
National Institute for Research in Inorganic Materials, Tsukuba, JP;
Primary Examiner:
Int. Cl.
CPC ...
B44C / ; C03C / ; C03C / ;
U.S. Cl.
CPC ...
156643 ; 156345 ; 156644 ; 156646 ; 156654 ; 156655 ; 156657 ; 156662 ; 20419235 ; 252 791 ; 427 38 ;
Abstract
A method for preparing needle-like, fibrous or porous diamond, or an aggregate thereof, which comprises subjecting diamond synthesized by a chemical vapor deposition method or a plasma-assisted vapor deposition method, or a film of such diamond, to plasma treatment in a gas stream containing oxygen, carbon dioxide, steam, hydrogen, a halogenated hydrocarbon or a halogenated carbon, or to thermal oxidation treatment in a gas stream containing oxygen, carbon dioxide or steam, for etching.