Patent ID: 7692676

Claim:
A thermal head comprising: a thermal radiating substrate; a temperature keeping layer formed on the thermal radiating substrate; a conductive layer formed on the thermal radiating substrate and an upper surface of the temperature keeping layer comprised of a fused material of nitride and metal or a fused material of oxide and metal; a first interlayer insulation layer formed by oxidization of the conductive layer except a portion of the conductive layer corresponding to a common electrode and a portion of the common electrode corresponding to an external connecting common electrode terminal; a second interlayer insulation layer comprised of insulating ceramics formed on the upper surface of the first interlayer insulation layer; a heat generating resistor member formed above the second interlayer insulation layer and the conductive layer; a common electrode and individual electrodes formed at a part of the upper surface of the heat generating resistor member; and a protecting layer covering the heat generating resistor member, common electrode, individual electrodes and second interlayer insulation layer.