Invention Grant
- Patent Title: Liquid discharge head
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Application No.: US17190494Application Date: 2021-03-03
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Publication No.: US11571891B2Publication Date: 2023-02-07
- Inventor: Harunobu Koike , Koji Sumi , Masao Nakayama
- Applicant: Seiko Epson Corporation
- Applicant Address: JP Toyko
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP Toyko
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JPJP2020-036627 20200304
- Main IPC: B41J2/14
- IPC: B41J2/14

Abstract:
A recording head includes a pressure chamber and a piezoelectric actuator configured to change a volume of the pressure chamber. The piezoelectric actuator includes a vibration plate forming one wall surface of the pressure chamber, a lower electrode formed on the vibration plate, a piezoelectric body formed on the lower electrode, and an upper electrode formed on the piezoelectric body and the vibration plate. When viewed from a ±Z direction orthogonal to the vibration plate, the lower electrode and the piezoelectric body do not overlap a central portion of the pressure chamber, when viewed from the ±Z direction, the lower electrode, the piezoelectric body, and the upper electrode overlap an end portion of the pressure chamber, and when viewed from the ±Z direction, the upper electrode overlaps the central portion of the pressure chamber.
Public/Granted literature
- US20210276329A1 Liquid Discharge Head Public/Granted day:2021-09-09
Information query
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