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. 28, 2025
Filed:
Dec. 16, 2021
Kokusai Electric Corporation, Tokyo, JP;
Hironori Shimada, Toyama, JP;
Tomoshi Taniyama, Toyama, JP;
Kokusai Electric Corporation, Tokyo, JP;
Abstract
There is provided a technique capable of shortening a temperature stabilization time in a process chamber by improving a heat insulation performance of a lower portion of the process chamber. A heat insulation structure is arranged in a vicinity of a furnace opening of a heat treatment furnace wherein a temperature gradient is formed at the vicinity of the furnace opening. The heat insulation structure includes a plurality of heat insulation plates with predetermined gaps therebetween. Each heat insulation plate includes a heat shield made of metal; and a seal made of quartz or ceramics and configured to cover a front surface and a rear surface of the heat shield. The heat shield is arranged in a vacuum cavity provided in the seal.