Patent ID: 7679034
Filing Date: 2010-03-16
Classification: H01L

Abstract:
1. A power-supplying member, which is disposed in a hollow 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 tubular supporting member, the power-supplying member comprising: a first rod-shaped member connected to said at least one of a heating resistor and an electrode; a second rod-shaped member connected to a power supply; and a thermal-function member, which is disposed between the first rod-shaped member and the second rod-shaped member, and which has a smaller axial cross section area and a larger surface area as compared to the first and second rod-shaped members, wherein a ratio of the axial cross sectional area of the thermal-function member to the axial cross sectional areas of the first and second rod-shaped members is not larger than 0.5.