Patent ID: 6607381
Filing Date: 2003-08-19
Classification: C30B,H01L

Abstract:
An auxiliary heat-insulating jig, provided between a wafer boat and a heat-insulating jig in a vertical heat treatment apparatus comprising said wafer boat and said heat-insulating jig, comprising:a plurality of vertically arranged plate insulators, wherein said plate insulators are made of opaque quartz, reinforcing parts reinforcing said plate insulators are provided on at least single surfaces of said plate insulators, said reinforcing parts include: (a) portions, having a larger thickness than the remaining portions, radially extending from the central portions of said plate insulators, and/or (b) portions, having a larger thickness than the remaining portions, forming circumferences apart from the central portions of said plate insulators, and said reinforcing parts are integrally formed with said plate insulators.