公开(公告)号：US20230117944A1

公开(公告)日：2023-04-20

申请号：US17966879

申请日：2022-10-16

申请人： THE JAPAN STEEL WORKS, LTD. ,  UNIVERSITY OF YAMANASHI

发明人： Kazuhito KISHIDA ,  Shoji KAKIO ,  Hiroaki YOKOTA ,  Takuya MARUKO ,  Kengo OGAWA

IPC分类号： H03H9/02

摘要： In a bonded substrate according to an embodiment, Euler angles (φ1, θ1, ψ1) of a first quartz-crystal substrate satisfy 0°≤φ1≤2°, 123°≤θ1≤128°, and 31°≤ψ1≤44°, Euler angles (φ2, θ2, ψ2) of a second quartz-crystal substrate bonded over the first quartz-crystal substrate satisfy 83°≤φ2≤95°, 82°≤θ2≤95°, and 159°≤ψ2≤161°, and a thickness of the second quartz-crystal substrate is 0.17 to 0.19 times a wavelength of a surface acoustic wave.

公开(公告)号：US20230128249A1

公开(公告)日：2023-04-27

申请号：US18086536

申请日：2022-12-21

申请人： THE JAPAN STEEL WORKS, LTD.

发明人： Kengo OGAWA ,  Shinya YAMADA ,  Hiroaki YOKOTA

IPC分类号： G02B5/30 ,  B32B7/023

摘要： A wave plate 1 according to an embodiment includes a first birefringent substrate 10 including a first main surface and an optical axis 13 in a first direction; a second birefringent substrate 20 disposed over the first birefringent substrate 10 and including a second main surface and an optical axis 23 in a second direction; and a third birefringent substrate 30 disposed over the second birefringent substrate 20 and including a third main surface and an optical axis 33 in a third direction. The first birefringent substrate 10 and the second birefringent substrate 20 are made of the same kind of birefringent material. The first main surface, the second main surface, and the third main surface are disposed in parallel to one another. The first direction and the second direction are parallel to the first main surface and the second main surface.

公开(公告)号：US20220069796A1

公开(公告)日：2022-03-03

申请号：US17390911

申请日：2021-07-31

申请人： THE JAPAN STEEL WORKS, LTD.

发明人： Kazuhito KISHIDA ,  Shoji KAKIO ,  Kengo OGAWA ,  Hiroaki YOKOTA

IPC分类号： H03H9/02 ,  H03F3/19 ,  H03H9/145 ,  H03H3/08 ,  H03H9/56 ,  H04B1/40

摘要： In a surface acoustic wave resonator according to an embodiment, a quartz-crystal substrate includes an AT-cut 0° X-propagation first quartz-crystal substrate and a Z-cut second quartz-crystal substrate bonded over the first quartz-crystal substrate. A propagation direction of a surface acoustic wave in the second quartz-crystal substrate is inclined from an X-axis of a crystal by 27 to 33°, 87 to 93°, or 147 to 153°, and a thickness of the second quartz-crystal substrate is 0.2 to 1.0 times a wavelength of the surface acoustic wave.