Liquid discharge head, cleaning method for liquid discharge head, liquid discharge apparatus, and substrate for liquid discharge head

摘要

A substrate for a liquid discharge head includes an upper protection film that covers at least a region corresponding to each of thermal energy generation elements. The upper protection film and at least one of the upper protection films adjacent to the upper protection film within a liquid chamber are respectively connected to different external electrodes, and a voltage can be applied therebetween via the different external electrodes.

主权项

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.