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:
Apr. 23, 1996
Filed:
Nov. 06, 1991
Chia-Fu Chen, Hsinchu, TW;
Kazuhito Nishimura, Osaka, JP;
Ensei Ko, Nishi Koiso, Oiso-machi, Naka-gun, Kanagawa-ken, JP;
Hiroshi Ishizuka, Tokyo, JP;
Satoru Hosomi, Hiratsuka, JP;
Ishizuka Research Institute, Ltd., Kanagawa, JP;
Other;
Osaka Diamond Industrial Co., Ltd., Osaka, JP;
Abstract
Making a diamond substance exhibiting a cathodoluminescence spectrum with the peak at a photon energy greater than 2.8 eV (electron volt), the half-value and 20%-value width not exceeding 0.5 eV and 0.8 eV, respectively, comprising: providing a substrate in a closed chamber, introducing a matrix gas comprising H.sub.2 and one selected from hydrocarbon and CO to said chamber, exciting the gas to create a plasma while heating said substrate to a temperature of at least 700.degree. C. and, thus, causing deposition and growth of diamond substance which is crystallographically diamond, controlling parameters of the deposition by means of the cathodoluminescence record and recovering the diamond substance from the chamber.