US 12,005,707 B2
Liquid discharge head and method for manufacturing the same
Keiji Kura, Chita (JP); Takashi Aiba, Nagoya (JP); Rui Wang, Nagoya (JP); and Shotaro Kanzaki, Handa (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on May 24, 2022, as Appl. No. 17/751,744.
Claims priority of application No. 2021-089791 (JP), filed on May 28, 2021.
Prior Publication US 2022/0379608 A1, Dec. 1, 2022
Int. Cl. B41J 2/14 (2006.01); B41J 2/16 (2006.01); H10N 30/073 (2023.01); H10N 30/20 (2023.01)
CPC B41J 2/14201 (2013.01) [B41J 2/1607 (2013.01); B41J 2/1623 (2013.01); H10N 30/073 (2023.02); H10N 30/2047 (2023.02)] 8 Claims
OG exemplary drawing
 
1. A liquid discharge head comprising:
a flow passage member which is formed with a plurality of individual flow passages, each of the individual flow passages including a nozzle and a pressure chamber communicated with the nozzle, the flow passage member having a surface on which the pressure chamber is open;
a sealing member which is arranged on the surface and configured to seal the pressure chamber; and
an actuator member which has a piezoelectric layer, a driving electrode, and a high electric potential portion, the piezoelectric layer being adhered to a first surface of the sealing member on a side opposite to the flow passage member, via a first adhesive having an insulating property, the driving electrode being arranged on a side opposite to the sealing member with respect to the piezoelectric layer at a position overlapped with the pressure chamber in a first direction orthogonal to the surface, the high electric potential portion being arranged on a side opposite to the sealing member with respect to the piezoelectric layer at an end portion of the piezoelectric layer in a second direction orthogonal to the first direction,
wherein any one of a high electric potential and a low electric potential lower than the high electric potential is selectively applied to the driving electrode,
the high electric potential portion is retained at the high electric potential,
the sealing member is retained at the low electric potential; and
a recess, which is overlapped in the first direction with the high electric potential portion, is formed on at least one of the surface and a second surface of the sealing member on a side opposite to the first surface.