Patent ID: 6753893
Filing Date: 2004-06-22
Classification: B41J

Abstract:
A thermal head comprising:a longitudinal substrate; a heat-retention layer made of a heat-retaining material, having at least a sticking-out section lying on one main surface of the substrate in a longitudinal direction at a constant width; a heating-resistor member made of a resistive material, formed at least on the sticking-out section of the heat-retention layer at a predetermined thickness and having a predetermined width same as said constant width of said sticking-out section; a common electrode provided touching the heating-resistor member; a plurality of separated electrodes provided facing a tip of the common electrode with a gap, at least an edge of each separated electrode touching the heating-resistor member, another edge of each separated electrode being connected to a driver circuit; and a protective layer formed on the heating-resistor member, a heating-resistor member portion provided on the gap between the common electrode and the separated electrodes functioning as a recording section, wherein the sticking-out section is formed straight in a longitudinal direction of the substrate and has an almost flat summit surface, the recording section being formed on the almost flat summit surface.