Patent ID: 8608885

Claim:
A substrate heat treatment apparatus for heat-treating a substrate, comprising: a heat-treating plate formed of metal and having a flat upper surface; support devices arranged on the upper surface of said heat-treating plate and formed entirely of a heat-resistant resin for contacting and supporting the substrate; wherein said support devices are projections formed on a sheet member for contacting the substrate; said sheet member being formed of heat-resistant resin and covering said flat upper surface of said heat-treating plate; a seal device disposed annularly on the upper surface of said heat-treating plate for contacting edges of the substrate to render gastight a space formed between the substrate and said heat-treating plate; and exhaust bores for exhausting gas from said space; said exhaust bores extending through said heat-treating plate from said upper surface to an opposite lower surface thereof; said heat-treating plate having a heating element mounted therein; said heat-treating plate having a metallic heat transfer portion disposed between said heating element and said upper surface of said heat-treating plate.