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:
Jan. 16, 1996
Filed:
Feb. 04, 1994
Mitsusuke Kyogoku, Tama, JP;
ASM Japan, K.K., Tokyo, JP;
Abstract
A thermal treatment apparatus for semiconductor materials is configured to prevent a metal contamination caused by a metal manifold and maintain a sufficient sealing and isolation effect between a transfer system containing chamber and a reaction chamber even when there exists a significant difference in pressure between the two chambers. A vent (7) having an inner diameter of 50 millimeters or greater for evacuating an inner section of a reaction chamber (1) made by quartz is provided in the reaction chamber (1). A seal flange is a double structure of a quartz flange (9) and a metal flange (10), and the metal flange is not emerged in the reaction chamber while the reaction chamber is sealed. Additionally, after the seal flange has been moved at a sealing position, a mobile section (12) is further moved such that the seal flange can not be pushed away by a pressure in the reaction chamber.