Patent ID: 9491805
Filing Date: 2016-11-08
CPC Classification: F23Q,H05B

Claim Text:
1. A heater comprising: an insulating base; a resistor buried in the insulating base; and a lead buried in the insulating base and connected to the resistor, wherein the heater includes a connection portion in which the resistor and the lead overlap each other in a direction perpendicular to an axial direction of the lead, a boundary between the resistor and the lead comprises a curved shape when the connection portion is seen in a cross section perpendicular to the axial direction, the lead decreases in width and thickness within the connection portion as the lead extends in the axial direction, and the boundary between the resistor and the lead at least at a rear end side of the connection portion when being seen in a cross section perpendicular to the axial direction comprises a curved shape so as to be convex at the lead side.