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:
Feb. 27, 2001
Filed:
Feb. 06, 1998
Wolfram Karcher, Schwaebisch Gmuend, DE;
Lutz Labs, Dresden, DE;
Infineon Technologies AG, Munich, DE;
Abstract
In chemical gaseous phase deposition (CVD=Chemical Vapor Deposition), there is frequently the problem of there still being an aggressive gas in the reaction chamber from the preceding layer production process. The aggressive gas can be a remainder of a process gas used for layer production or it can be a remainder gas produced by the reaction of the process gasses. The aggressive gas can cause undesirable reactions on the surface of the semiconductor product, which damage the semiconductor product. A process for layer production on a surface includes supplying at least one protective gas to the surface before and/or during the heating of the surface to the reaction temperature. Through the use of the protective gas, on one hand the aggressive gas still remaining in the reaction chamber is thinned and on the other hand a part of the protective gas adsorbs onto the cold surface so that on the surface, preferably reactions of the aggressive gas with the protective gas occur and the surface layers themselves remain essentially undamaged.