Patent ID: 11884072
Assignee: BROTHER KOGYO KABUSHIKI KAISHA
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A liquid discharge head comprising:
a flow passage substrate which is formed with a plurality of individual flow passages, the individual flow passages including a plurality of nozzles and a plurality of pressure chambers communicated with the nozzles respectively, the pressure chambers being open on a surface of the flow passage substrate;
a sealing member which is adhered to the surface via an adhesive and configured to seal the pressure chambers; and
an actuator substrate which has a piezoelectric layer and a plurality of individual electrodes, the piezoelectric layer being adhered to a surface of the sealing member on a side opposite to the flow passage substrate via an adhesive, the individual electrodes being formed on a side opposite to the sealing member with respect to the piezoelectric layer, the individual electrodes being overlapped with the pressure chambers respectively in an orthogonal direction orthogonal to the surface,
wherein the sealing member is composed of a material different from a material of the piezoelectric layer,
the surface has an adhesion area to which the sealing member is adhered and a non-adhesion area to which the sealing member is not adhered, and
the surface is formed with:
a first groove which extends in an extending direction directed from the adhesion area to the non-adhesion area and which spreads over the adhesion area and the non-adhesion area; and
a second groove which extends in an intersecting direction intersecting with the extending direction in the non-adhesion area and which is connected to the first groove.