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.

公开(公告)号：US10763821B2

公开(公告)日：2020-09-01

申请号：US15681440

申请日：2017-08-21

申请人： NIHON DEMPA KOGYO CO., LTD.

发明人： Shigetaka Kaga ,  Yoshiro Teshima ,  Kazuhiro Hirota

IPC分类号： H03H3/02 ,  H03H9/19 ,  H03H9/13 ,  H03H9/05 ,  H03H3/04

摘要： A crystal resonator vibrates in a thickness-shear mode. The crystal resonator includes excitation electrodes being disposed on a front surface and a back surface of a crystal element. The excitation electrodes are disposed on the crystal element to have a positional relationship, where a displacement distribution at an edge of the excitation electrode on the front surface is identical to a displacement distribution at an edge of the excitation electrode on the back surface.

公开(公告)号：US10277197B2

公开(公告)日：2019-04-30

申请号：US15387654

申请日：2016-12-22

申请人： NIHON DEMPA KOGYO CO., LTD.

发明人： Shigetaka Kaga ,  Kazuhiro Hirota ,  Yoshiro Teshima ,  Masaaki Nakahara

IPC分类号： H03H9/19 ,  B06B1/06 ,  H03H9/02 ,  H03H9/13

摘要： A piezoelectric vibrating piece includes a vibrating piece body including a vibrator and at least one pair of excitation electrodes formed on a front surface and a back surface of the vibrator. The vibrating piece body is a twice rotated quartz-crystal vibrating piece. The pair of excitation electrodes are arranged in a Z′″-axis direction determined by an X′″-axis and obliquely disposed with respect to the Y″-axis direction. The X′″-axis is rotated by 260° to 300° counterclockwise about a Y″-axis using a +X″-axis direction as a reference. The pair of excitation electrodes are formed to have respective semicircle shapes including straight line portions extending in the X′″-axis direction and to be disposed in a state where the straight line portions overlapping with one another. The straight line portion of the excitation electrode includes an inclined portion that gradually decreases in thickness toward an end portion of the excitation electrode.

公开(公告)号：US09369109B2

公开(公告)日：2016-06-14

申请号：US14548219

申请日：2014-11-19

申请人： NIHON DEMPA KOGYO CO., LTD.

发明人： Kazuhiro Hirota ,  Osamu Tokuda

IPC分类号： H03B5/32 ,  H03H9/02 ,  H03H9/25 ,  H03H3/10 ,  H03H9/13

CPC分类号： H03H9/02551 ,  H03B5/326 ,  H03H3/10 ,  H03H9/02834 ,  H03H9/02992 ,  H03H9/13 ,  H03H9/25

摘要： A surface acoustic wave device includes a quartz substrate and a periodic structure portion. The quartz substrate is constituted such that a surface acoustic wave is to propagate on a surface with an Euler angle of (0°, 16°

摘要翻译： 表面声波装置包括石英基板和周期性结构部分。 石英衬底被构造成使得表面声波在欧拉角（0°，16°<＆amp;; nlE; 18.5°，0°）的表面上传播。 周期结构部分设置在石英基片上，并包括沿与声表面波的传播方向相交的方向延伸的多个电极。 电极沿着传播方向彼此平行地设置。 周期性结构部分主要包含铝。 当传播方向上的电极的宽度尺寸和彼此相邻的电极之间的间隔尺寸分别被定义为L和S时，金属化率＆ （＆eegr; = L÷（L + S））设定为0.4以下。

公开(公告)号：US09059676B2

公开(公告)日：2015-06-16

申请号：US13651461

申请日：2012-10-14

申请人： NIHON DEMPA KOGYO CO., LTD.

发明人： Kazuhiro Hirota ,  Atsushi Mori

IPC分类号： H03H9/25 ,  H03H9/64 ,  H03H9/02

CPC分类号： H03H9/02559 ,  H03H9/02574

摘要： Disclosed is a surface acoustic wave device which has IDT electrodes arranged over a lithium tantalate piezoelectric substrate and is capable of suppressing propagation losses even at a high frequency band equal to or higher than 2 GHz as low as possible in order to utilize surface acoustic waves including LSAW. For this purpose, 45° to 46° rotated YX-cut lithium tantalate substrate is used as the piezoelectric substrate, a thickness of the IDT electrode is set to 7.5% λ to 8% λ, and a metallization ratio in electrode fingers of the IDT electrode is set to 0.55 to 0.65.

摘要翻译： 公开了一种表面声波器件，其具有布置在钽酸锂压电衬底上的IDT电极，并且即使在等于或高于2GHz的高频带也能够抑制传播损耗，以便尽可能低地使用表面声波，包括 LSAW。 为此，将45°至46°旋转的YX切割的钽酸锂基板用作压电基板，IDT电极的厚度设定为λ至8％λ的7.5％，并且IDT的电极指的金属化率 电极设定为0.55〜0.65。

公开(公告)号：US10250225B2

公开(公告)日：2019-04-02

申请号：US15391846

申请日：2016-12-28

申请人： NIHON DEMPA KOGYO CO., LTD.

发明人： Yoshiharu Sato ,  Yoshiro Teshima ,  Hirokazu Iwata ,  Kazuhiro Hirota

IPC分类号： H03H9/02 ,  H03H9/19

摘要： An AT-cut crystal element includes a crystal element having two side surfaces (namely, a Z′-surface) intersecting with a Z-axis of a crystallographic axis thereof. At least one of the two side surfaces is constituted of three of first to third surfaces. The first to the third surfaces meeting following conditions: the first to the third surfaces intersect with one another in this order and formed by rotating a principal surface of the crystal element by predetermined angles; and expressing the angle of the first surface as θ1, a length of the first surface as D, a thickness of a part of the crystal element having the principal surface as t, and M=D/t, and a conversion percentage as fn (M, (θ1)), the θ1 and the M are set such that the conversion percentage fn (M, (θ1)) becomes a predetermined value Th or less.