Patent ID: 8192006

Claim:
A liquid-jet head chip, comprising: an actuator substrate comprising a plurality of liquid discharge flow paths, the plurality of liquid discharge flow paths each being open on one surface of the actuator substrate, the plurality of liquid discharge flow paths being formed in parallel at a distance from each other; a cover plate substrate bonded onto the one surface of the actuator substrate; the cover plate substrate comprising: an opening portion being open on a surface of the cover plate substrate on a side opposite to the actuator substrate and being in communication with the liquid discharge flow paths; and an air vent flow path for bringing the surface on which the opening portion is open and an end surface extending in a thickness direction of the cover plate substrate into communication with each other, the opening portion and the air vent flow path being provided independently of each other; a foreign substance removal filter for removing a foreign substance provided at a position at which the opening portion of the cover plate substrate is substantially closed; and a filter for allowing passage of air bubbles, having a smaller passage resistance than that of the foreign substance removal filter, provided at a position at which an opening of the air vent flow path is substantially closed.