Patent ID: 9044948
Filing Date: 2015-06-02
Classification: B41J,Y10T

Abstract:
1. A liquid discharge head substrate comprising: a base; a pair of wiring lines placed on or above the base; a heat-generating resistive layer which is placed on or above the base, which is in contact with the wiring lines, and which has a portion corresponding to a space between the wiring lines, the portion forming an electrothermal transducer; an insulating layer which covers the heat-generating resistive layer and the wiring lines and which contains Si; a protective layer which covers at least one region of the insulating layer that corresponds to the electrothermal transducer and which contains Ir; and an intermediate layer which is placed between the insulating layer and the protective layer and which is in contact with the insulating layer and the protective layer, wherein the intermediate layer contains a material represented by the formula Ta