Substrate for ink jet head, ink jet head provided with said substrate and ink jet apparatus having such ink jet head

摘要

There is provided an ink jet head which includes an electrothermal converting body disposed along a pathway of ink, said electrothermal converting body being provided with a heat generating resistor capable of generating, upon energization, heat energy to be directly applied to ink on a heat acting face whereby discharging said ink, characterized in that said heat generating resistor is composed of a material containing at least Ir and other one specific element at the specific respective composition rates or a material containing at least Ir and other two specific elements at the specific respective composition rates, said heat generating resistor constituted by any of said materials being capable of exhibiting a sufficient durability even in the case of driving the ink jet head with a relatively long drive pulse duration.