Patent ID: 6330014
Filing Date: 2001-12-11
Classification: B41J

Abstract:
A thermal head, comprising:a heat insulating layer formed on an upper surface of a substrate;plural heater elements formed in a row over the heat insulating layer;plural separate electrodes uniquely electrically connected to one of the plural heater elements; anda common electrode, wherein:the common electrode is comprised of a base electrode layer connected to a common electrode terminal provided on both outsides of columns of the separate electrodes and a conductive layer connected to the base electrode layer and formed on a side of the row of heater elements;the common electrode is formed on most of a surface of the heat insulating layer;a layer insulating layer to electrically insulate the common electrode and the separate electrodes is formed on the common electrode;the separate electrodes and the row of heater elements are formed on the layer insulating layer; andan edge of the base electrode layer is provided opposite to an edge of the row of heater elements in a direction of the surface of the substrate and the edge of the base electrode layer is protruded in one of a triangle and an arc.