Patent ID: 9004650
Filing Date: 2015-04-14
Classification: B41J

Abstract:
1. A liquid discharge head comprising: a substrate for the liquid discharge head including, a plurality of thermal energy generation elements configured to generate thermal energy for discharging a liquid, an insulation protection layer configured to cover each of the plurality of thermal energy generation elements, and an upper protection film, which is made of a material including at least one of iridium and ruthenium and is disposed corresponding to each of the plurality of thermal energy generation elements, configured to cover at least a region of the insulation protection layer corresponding to each of the plurality of thermal energy generation elements, in this order; and a liquid chamber forming member configured to form, together with the substrate for the liquid discharge head, a liquid chamber in which a plurality of the upper protection films is arranged, wherein the upper protection film and at least one of the upper protection films adjacent to the upper protection film within the liquid chamber are respectively connected to different external electrodes, and a voltage can be applied therebetween via the different external electrodes.