| 摘要 |
PURPOSE:To effectively transfer the heat generated by a resistor to a printing paper and contrive enhancement of thermal efficiency of a thermal recording head, by providing an insulating film beneath a resistor film located amid a pair of conductor films while setting the width of the insulating film to be smaller than the spacing between the conductor films. CONSTITUTION:An insulating layer 5 having a width smaller than the spacing between electrodes 3, 3 is provided on an insulating substrate 1 by screen printing, followed by drying, firing and polishing the surface of the layer 5. A resistor film 2 is provided on the insulating layer 5 by an ordinary method so that end parts thereof adjoining the electrodes are located on the outside of the insulating layer 5 to step a part thereof adjoining the substrate 1. A pair of the electrodes 3, thinner than the insulating layer 5, are provided at a predetermined interval at the end parts of the resistor film 2, and a protective layer 4 is provided thereon. Thus, the heat generated by a resistor can be transferred to a printing surface without obstruction by the electrode parts, and thermal efficiency is greatly enhanced. In addition, the shape of a printed dot is the same as that of a heat generating resistor, and printing quality is enhanced. |
