公开(公告)号：US20200086644A1

公开(公告)日：2020-03-19

申请号：US16341099

申请日：2018-01-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： KENSUKE MIHARA

IPC: B41J2/14 ,  H01L41/187 ,  H01L41/09

Abstract: A piezoelectric element includes a lower electrode, an upper electrode, and a piezoelectric layer disposed between the lower and upper electrodes. The piezoelectric layer contains (niobium, manganese)-doped lead zirconate titanate. In the (niobium, manganese)-doped lead zirconate titanate, a ratio of the number of moles of niobium to a total of the number of moles of niobium, manganese, zirconium, and titanium is not less than 10% and is not more than 25%. The ratio of the number of moles of manganese to the total of the number of moles of niobium, manganese, zirconium, and titanium is not less than 0.3% and is not more than 1.2%. This piezoelectric element decreases an internal electric field therein.

公开(公告)号：US20200052188A1

公开(公告)日：2020-02-13

申请号：US16338912

申请日：2017-12-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： KENSUKE MIHARA ,  TAKAKIYO HARIGAI

IPC: H01L41/08 ,  H01L41/09 ,  H01L41/187 ,  B41J2/14

Abstract: A piezoelectric functional film includes a base layer and a piezoelectric layer. The piezoelectric layer contains niobium-doped lead zirconate titanate. The base layer contains one of niobium-doped lead titanate, (niobium, lanthanum)-doped lead titanate, and (niobium, lanthanum, magnesium)-doped lead titanate.