公开(公告)号：US11005028B2

公开(公告)日：2021-05-11

申请号：US16357864

申请日：2019-03-19

Applicant: TDK CORPORATION

Inventor： Hiroki Katoh ,  Yuiko Hirose ,  Masakazu Hirose ,  Mirai Ishida

IPC: H01L41/187 ,  H01L41/43 ,  C04B35/495 ,  C04B35/63

Abstract: A piezoelectric composition including copper, germanium and a complex oxide represented by a compositional formula KmNbO3 and having a perovskite structure, in which m in the compositional formula satisfies 0.970≤m≤0.999, and with respect to 1 mol of the complex oxide, x mol % of copper in terms of a copper element and y mol % of germanium in terms of a germanium element are contained, wherein x satisfies 0.100≤x≤1.000 and y satisfies 0.000

公开(公告)号：US11195986B2

公开(公告)日：2021-12-07

申请号：US16496987

申请日：2018-03-20

Applicant: TDK CORPORATION

Inventor： Yuiko Hirose ,  Hiroki Katoh ,  Masakazu Hirose

IPC: H01L41/187 ,  C04B35/495

Abstract: A piezoelectric composition having a complex oxide including potassium and niobium, in which the complex oxide has a first phase represented by a compositional formula KNbO3, and one or two phases selected from a second phase represented by a compositional formula K4Nb6O17 and a third phase represented by a compositional formula KNb3O8.

公开(公告)号：US11659769B2

公开(公告)日：2023-05-23

申请号：US16497052

申请日：2018-03-20

Applicant: TDK CORPORATION

Inventor： Masakazu Hirose ,  Yuiko Hirose ,  Hiroki Katoh

IPC: H01L41/187

CPC classification number: H10N30/8542 ,  H10N30/072 ,  H10N30/50 ,  H10N30/097

Abstract: A piezoelectric composition including manganese and a complex oxide having a perovskite structure represented by a general formula ABO3, wherein an A site element in the ABO3 is potassium or potassium and sodium, a B site element in the ABO3 is niobium, a concentration distribution of the manganese has a variation, and the variation shows a CV value of 35% or more and 440% or less.

公开(公告)号：US11271147B2

公开(公告)日：2022-03-08

申请号：US17040310

申请日：2019-03-19

Applicant: TDK CORPORATION

Inventor： Masakazu Hirose ,  Yuiko Hirose ,  Hiroki Katoh ,  Tamotsu Sasaki ,  Yuji Umeda

IPC: H01L41/187 ,  C04B35/495

Abstract: A piezoelectric composition containing: a complex oxide having a perovskite structure represented by a general formula of ABO3; copper; and one or more elements selected from the group consisting of chromium, nickel and zinc, in which in ABO3, an A-site element is potassium and a B-site element is niobium, or niobium and tantalum, with respect to 1 mol of the complex oxide, a content ratio of the copper is α mol % in terms of CuO, a content ratio of one or more elements selected from the group consisting of chromium, nickel and zinc is β mol % in terms of CrO3/2, NiO, ZnO, α satisfies a relationship of 0.2≤α≤2.5, and β satisfies a relationship of 0.2≤β≤2.0.

公开(公告)号：US11239410B2

公开(公告)日：2022-02-01

申请号：US16497090

申请日：2018-03-20

Applicant: TDK CORPORATION

Inventor： Hiroki Katoh ,  Yuiko Hirose ,  Masakazu Hirose

IPC: H01L41/187 ,  C04B35/495 ,  H01L41/083

Abstract: A piezoelectric composition including copper and a complex oxide having a perovskite structure represented by a general formula ABO3, in which an A site element in the ABO3 is potassium or potassium and sodium, a B site element in the ABO3 is niobium or niobium and tantalum, the copper is included in n mol % in terms of a copper element with respect to 1 mol of the complex oxide, and n satisfies 0.100≤n≤1.000.

公开(公告)号：US12232421B2

公开(公告)日：2025-02-18

申请号：US17203459

申请日：2021-03-16

Applicant: TDK CORPORATION

Inventor： Masakazu Hirose ,  Yuiko Hirose

IPC: H01L41/083 ,  H01L41/047 ,  H01L41/187 ,  H01L41/297 ,  H01L41/43 ,  H10N30/067 ,  H10N30/097 ,  H10N30/50 ,  H10N30/853 ,  H10N30/87

Abstract: A piezoelectric composition according to the present invention comprising: a carbon, and a main component composed of an alkali metal niobate based compound. The amount of carbon contained is 350 to 700 ppm by weight.