Patent ID: 11937345
Assignee: MICO CERAMICS LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A ceramic heater comprising:
a heater plate made of a ceramic material on which a heating element is disposed;
a tubular shaft having a through hole, wherein the shaft is coupled to a bottom surface of the heater plate and accommodates a rod configured to supply power to the heating element through the through hole; and
a continuous or intermittent air pocket provided in a joint portion where the heater plate and the shaft are abutted on each other to be coupled to each other,
wherein the air pocket is provided along joined surfaces in the joint portion, the air pocket includes a groove provided in the heater plate along the joined surfaces of the joint portion at a bent portion of an upper end of the shaft for joining the heater plate, wherein the groove is provided wider toward the heater plate than toward the joined surfaces.