Patent ID: 8058592
Filing Date: 2011-11-15
Classification: G01N,H05B,Y10T

Abstract:
1. A ceramic heater to be built in a gas sensor capable of detecting a concentration of a specific gas component contained in a target gas to be measured, comprising: a heater base member made of ceramic; a heating element formed in the inside of the heater base member; a pair of external electrode pads, each of which is formed at an outer surface of the heater base member and electrically connected to a corresponding output terminal of an outer lead; and a pair of heater leads through which the heating element is electrically connected to a pair of the external electrode pads, at least a part of an outer surface of each external electrode pad is covered only with a dense protective film made only of noble metal, said noble metal being at least one of gold (Au), silver (Aq), platinum (Pt), rhodium (Rh), and palladium (Pd).