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:
Oct. 22, 1996
Filed:
Apr. 11, 1995
Tamotsu Morimoto, Yamanashi-ken, JP;
Tokyo Electron Limited, Tokyo, JP;
Abstract
A heat processing apparatus for subjecting heat processing to a wafer by heating includes a reaction tube for containing the wafers, a heating element provided around the reaction tube, for heating an inside of the reaction tube, a plurality of heat radiating members provided concentrically around the heating element with an airtight space between the heating element and an innermost one of the heat radiating members and airtight spaces between the heat radiating members, and a pressure-reducing device for reducing the pressure of these airtight spaces. In this heat processing apparatus, the pressures of the airtight spaces are reduced by the pressure-reducing means at least when the temperature of the inside of the reaction tube is increased.