Invention Grant
- Patent Title: Piezoelectric element and liquid ejection head
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Application No.: US16217123Application Date: 2018-12-12
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Publication No.: US10580958B2Publication Date: 2020-03-03
- Inventor: Koji Sumi , Harunobu Koike , Toshiaki Takahashi , Koichi Morozumi
- Applicant: Seiko Epson Corporation
- Applicant Address: JP
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP2017-238792 20171213
- Main IPC: H01L41/047
- IPC: H01L41/047 ; B41J2/14 ; H01L41/29 ; H01L41/318 ; H01L41/187
Abstract:
A piezoelectric element includes: a first electrode containing crystal grains; a piezoelectric layer which contains potassium, sodium, and niobium and which is provided above the first electrode; and a second electrode provided above the piezoelectric layer, and the average grain diameter of the crystal grains is less than 550 nm.
Public/Granted literature
- US20190181328A1 PIEZOELECTRIC ELEMENT AND LIQUID EJECTION HEAD Public/Granted day:2019-06-13
Information query
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