CERAMIC HEATER, GLOW PLUG USING THE CERAMIC HEATER, AND CERAMIC HEATER MANUFACTURING METHOD

摘要

A ceramic heater comprises a heat-generating resistor, configured for supplying power to the heat-generating resistor, a ceramic body containing the heat-generating resistor and the lead therein. The heat-generating resistor comprises a connecting portion being connected to the lead and having a width less than the width of the lead, and a main heat-generating portion other than the connecting portion. The lead comprises a recessed portion being located at end portion of the lead, being connected to the connecting portion, and being open at an only one side of the longitudinal direction of the lead and an only one side of the thickness direction of the lead. At least a part of the connecting portion is located inside the recessed portion.