公开(公告)号：US20240172564A1

公开(公告)日：2024-05-23

申请号：US18283607

申请日：2022-03-28

Applicant: NITTO DENKO CORPORATION

Inventor： Gaku TSUBURAOKA ,  Daisuke NAKAMURA ,  Taketo ISHIKAWA ,  Hironobu MACHINAGA

IPC: H10N30/853 ,  C04B35/453 ,  C30B23/08 ,  C30B25/06 ,  C30B29/16 ,  H10N30/076

CPC classification number: H10N30/853 ,  C04B35/453 ,  C30B23/08 ,  C30B25/06 ,  C30B29/16 ,  H10N30/076 ,  C04B2235/3206 ,  C04B2235/3284 ,  C04B2235/46 ,  C04B2235/762 ,  C04B2235/95

Abstract: A piezoelectric film contains a piezoelectric material having a wurtzite-type crystal structure as a main component, and an additive element containing Kr, wherein the piezoelectric material contains a component selected from the group consisting of Zn, Al, Ga, Cd, and Si, as an electropositive element, and wherein a ratio of a content of Kr element to a content of contained elements in the piezoelectric material is in a range from 0.01 atm % to 0.05 atm %.