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:
May. 13, 1997
Filed:
Sep. 12, 1995
Applicant:
Inventors:
Yutaka Inaba, Hyogo, JP;
Kiyoteru Kobayashi, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
427 79 ; 427 81 ; 4271262 ; 427255 ; 4272552 ; 4272557 ;
Abstract
In the formation of a silicon nitride film, dichlorosilane and ammonia are used as source gas and, for example, argon is used as carrier gas. The pressure (total pressure) inside a chamber is set to about 100 to 300 Torr (1.33.times.10.sup.4 to 4.00.times.10.sup.4 Pa). The desirable setting is that, for example, dichlorosilane is 60 SCCM, ammonia is 300 SCCM and hydrogen is 20 SLM. When the silicon nitride film is formed under such conditions, improvement in a masking effect of the silicon nitride film for preventing oxidation can be achieved.