Patent ID: 7390990

Claim:
A heating device, comprising: an electrically insulating ceramic base having a heating surface for heating an object on the heating surface; a high frequency electrode embedded in the electrically insulating ceramic base proximate the heating surface; a heating body disposed in the electrically insulating ceramic base in a location that is spaced further apart from the heating surface than a location of the high frequency electrode; and at least one electrically conductive ceramic member exposed to a part of the heating surface of the insulting ceramic base and connected to an electrically conductive member provided in the insulating ceramic base, the at least one electrically conductive ceramic member comprising a first electrically conductive ceramic member provided to contact the object on the heating surface of the insulating ceramic base and a second electrically conductive ceramic member provided to contact a member mounted on the heating surface; wherein the first electrically conductive member is connected to the high frequency electrode; and wherein the second electrically conductive ceramic member is connected to an electrical wire embedded in the electrically insulating ceramic base separately from the high frequency electrode, and the electrical wire is connected to an external power supply; wherein the electrically conductive ceramic member has a main ceramic component that is common to the insulating ceramic base; and wherein the electrically conductive ceramic member has a thermal expansion coefficient that is equivalent to a thermal expansion coefficient of the electrically insulating ceramic base.