Patent ID: 7544916

Claim:
A heating device, comprising: a ceramic base having gas flow passages formed therein; a resistance heating body embedded in the base; and gas flow rate adjusting members, which vary flow rates of gas flowing through inner portions of the gas flow passages, comprising adjustment members that each include an insertion portion capable of being inserted into an insertion hole of the base, whereby the insertion portions protrude/retreat into/out of the inner portions of the gas flow passages; wherein a front surface of the base defines a substrate heating surface which heats up a substrate, and gas injection ports open on the substrate heating surface; wherein one end of each of the gas flow passages defines one of the gas injection ports, and the other end of each of the gas flow passages defines a gas introduction port through which the gas flows into the gas flow passage; and wherein the gas introduced from the gas introduction ports flows through the inner portions of the gas flow passages, and is discharged from the gas injection ports to the substrate heating surface.