Patent ID: 7525071
Filing Date: 2009-04-28
Classification: H01L,H05B

Abstract:
1. A power-supplying member, which is disposed in a hollowed part of a tubular supporting member, and which supplies power to at least one of a heating resistor and an electrode which are embedded in a ceramic base supported by the supporting member, the power-supplying member comprising: a first rod-shaped member connected to a power-supplied object; a second rod-shaped member connected to a power supply; and a thermal-expansion absorbing member, which is disposed between the first rod-shaped member and the second rod-shaped member, and which shrinks in a longitudinal direction in response to changes in shape of the first rod-shaped member and the second rod-shaped member in the longitudinal direction due to thennal expansion, wherein the thermal-expansion absorbing member is a thin-plate member having alternating series of convex and concave bending portions in the longitudinal direction, each bending portion extending along a direction orthogonal to the longitudinal direction, and wherein the ratio of distance between a convex bending portion and an adjacent concave bending portion in a direction orthogonaI to the longitudinal direction to distance p between a convex bending portion and the next convex bending portion in the longitudinal direction is not smaller than 0.2, but not larger than 2.