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公开(公告)号：US10819307B2
公开(公告)日：2020-10-27
申请号：US16057834
申请日：2018-08-08
IPC分类号： H03H9/13 , H01L41/332 , H03B5/32 , H01L41/053 , H01L41/047 , H03H9/19 , H03H3/02 , H03H9/17 , H03H9/02
摘要： A crystal unit includes an AT-cut crystal element that has a planar shape in a rectangular shape and a part as a thick portion. The crystal element includes a first end portion, a first depressed portion, the thick portion, a second depressed portion, and a second end portion in an order from a side of one short side in viewing a cross section taken along a longitudinal direction near a center of the short side. The first depressed portion is a depressed portion disposed from the thick portion toward the first end portion side, depressed with a predetermined angle θa and subsequently bulged, and connected to the first end portion. The second depressed portion is a depressed portion disposed from the thick portion toward the second end portion side, depressed with a predetermined angle θb and subsequently bulged, and connected to the second end portion.
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公开(公告)号：US10529910B2
公开(公告)日：2020-01-07
申请号：US15730749
申请日：2017-10-12
发明人： Yoshiharu Sato , Hirokazu Iwata
IPC分类号： H01L41/047 , H01L41/053 , H01L41/22 , H01L41/29
摘要： A piezoelectric device includes a piezoelectric vibrating piece, an excitation electrode, an extraction electrode, a container, a pad, a conductive member, and a heat conductive metal film. The excitation electrode is disposed on a front surface and a back surface of the piezoelectric vibrating piece. The extraction electrode is extracted from the excitation electrode. The container houses the piezoelectric vibrating piece. The pad is disposed in the container, and the pad is connected to the piezoelectric vibrating piece. The conductive member connects the pad to the extraction electrode. The heat conductive metal film is disposed at least on a surface of a pad side of the piezoelectric vibrating piece, the heat conductive metal film is extracted from the extraction electrode without contacting the excitation electrode.
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公开(公告)号：US10333489B2
公开(公告)日：2019-06-25
申请号：US15255119
申请日：2016-09-01
发明人： Kenji Shimao , Yoshiharu Sato , Hirokazu Iwata
摘要： A crystal unit includes an AT-cut crystal element and a container. The AT-cut crystal element has an approximately rectangular planar shape. The AT-cut crystal element includes a first inclined portion, second inclined portions, and a first secured portion. The first inclined portion is inclined such that the crystal element decreases in thickness from a proximity of the first side to the first side. The second inclined portions are disposed on respective both ends of the first side, the second inclined portions being formed integrally with the first inclined portion. The second inclined portions are inclined gentler than the first inclined portion. The first secured portion and a second secured portion are formed integrally with the second inclined portion. The first secured portion and the second secured portion each project out from the first side to outside the crystal element to be used for securing with the securing members.
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公开(公告)号：US11296275B2
公开(公告)日：2022-04-05
申请号：US16136291
申请日：2018-09-20
发明人： Tetsuya Watanabe , Hirokazu Iwata , Yoshiharu Sato
IPC分类号： H01L41/053 , H01L41/09 , H01L41/047 , H03H9/02 , H01L41/332 , H03H9/17 , H03H9/19 , H01L41/18
摘要： A piezoelectric device includes a piezoelectric vibrating piece and a container. The piezoelectric vibrating piece has a rectangular planar shape and has a portion of a first side secured to the container. The piezoelectric vibrating piece has a second side opposing the first side and includes a projecting portion that projects outward from the second side in at least one of proximity of both ends of the second side along the second side.
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公开(公告)号：US10263597B2
公开(公告)日：2019-04-16
申请号：US15255117
申请日：2016-09-01
发明人： Yoshiharu Sato , Kenji Shimao , Hirokazu Iwata
摘要： A crystal unit includes an AT-cut crystal element, excitation electrodes, extraction electrodes. The AT-cut crystal element has an approximately rectangular planar shape. The excitation electrodes are disposed on front and back of principal surfaces of the AT-cut crystal element. The extraction electrodes are extended from the excitation electrodes to a side of one side of the AT-cut crystal element via a side surface of the AT-cut crystal element. Assuming that an extraction angle of the extraction electrode from the principal surface to the side surface is defined as an angle θ with respect to an X-axis of a crystallographic axis of a crystal, the angle θ is equal to or greater than 59 degrees and equal to or less than 87 degrees.
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公开(公告)号：US10250225B2
公开(公告)日：2019-04-02
申请号：US15391846
申请日：2016-12-28
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.
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