公开(公告)号：US12101075B2

公开(公告)日：2024-09-24

申请号：US17238211

申请日：2021-04-23

申请人： NIHON DEMPA KOGYO CO., LTD.

发明人： Tetsuya Watanabe ,  Takahiro Ohtsuka ,  Kazuhiko Osawa ,  Kazuhiro Hirota ,  Yoshiro Teshima

IPC分类号： H03H9/02 ,  H03H3/02 ,  H03H9/05 ,  H03H9/10 ,  H03H9/19 ,  H10N30/082

CPC分类号： H03H9/02023 ,  H03H3/02 ,  H03H9/0509 ,  H03H9/1021 ,  H03H9/19 ,  H10N30/082 ,  H03H2003/022

摘要： A piezoelectric device includes a conductive adhesive, a container, and an AT-cut crystal element. The AT-cut crystal element has at least one side surface intersecting with a Z′-axis of the crystallographic axis of the crystal constituted of three surfaces. When a dimension of a straight-line portion along the Z′-axis of a second side opposed to the first side is expressed as W1 and a dimension along the Z′-axis of the AT-cut crystal element is expressed as W0, W1/W0 is 0.91 or greater, and the straight-line portion has both sides constituting corner portions in approximately right angles with sides along an X-axis of the crystal of the AT-cut crystal element. The side of the first side is at a −X-side in an X-axis of the crystallographic axis of the crystal and a side of the second side is at a +X-side in the X-axis.