Thermal head, manufacturing method, and thermal printer using the thermal head

Abstract

The present invention relates to a thermal head and the manufacturing method. In the thermal head, even when a multilayer wiring constitution is adopted, a trouble caused by bad connection or bad insulation in respective layers can be certainly prevented, and even if a real edge constitution is adopted, manufacturing is easy and reliability can be maintained high. A heat insulating layer is formed in a position corresponding to that of a heating portion on a substrate; a conductive layer composed of a resistor material is formed on the upper surfaces of the substrate and the heat insulating layer; an insulating layer which is obtained in oxidizing the surface of the conductive layer with a thermal oxidation method is formed on the conductive layer except the area which corresponds to the positions of a common electrode and the terminal portion of the common electrode; predetermined heating resistors are formed so that their both end parts can be positioned on the upper side of the insulating layer and the conductive layer respectively; individual electrodes are formed in the edge portion of the upper surface of the heating resistors on the side of the insulating layer; and a common electrode is formed in the edge portion on the side of the conductive layer.

Dependencies are inferred from the claim text.