GLASS FORMING MOLD, GLASS FORMING DEVICE, GLASS FORMING METHOD, AND METHOD FOR MANUFACTURING PHOTOMASK SUBSTRATE

摘要

A glass forming mold is provided with: a mold body (10) used to form glass by heating and pressurizing the glass; and a support member (15) disposed so that the support member (15) can come into contact with the movable member (11) of the mold body and capable of being broken in order to relieve stress caused by the difference in linear expansion coefficient between the mold body and the glass.