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公开(公告)号：US11417825B2
公开(公告)日：2022-08-16
申请号：US16462379
申请日：2017-11-07
申请人： MURATA MANUFACTURING CO., LTD. , KANSAI UNIVERSITY , Panasonic Intellectual Property Management Co., Ltd.
IPC分类号： H01L41/193 , H01L41/083 , G01L1/16 , H01L41/047 , H01L41/113 , H02N2/18
摘要： Provided is a piezoelectric laminate element that outputs a fixed output voltage even in response to a static load for which an output voltage could not be obtained using a conventional piezoelectric element. A piezoelectric laminate body in which a plurality of piezoelectric polymer film layers consisting of film such as polylactic acid film that exhibits piezoelectricity in the planar direction are laminated is used as a piezoelectric laminate element. The piezoelectric laminate body is given a cylindrical shape, rounded rectangle shape, or other partially curved shape. The output voltage follows the increase and decrease of the applied load, and if a fixed load is continuously applied, a fixed output voltage is continuously output, and a piezoelectric laminate element is obtained that outputs a fixed output voltage even if a load is static.
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公开(公告)号：US09929335B2
公开(公告)日：2018-03-27
申请号：US14652302
申请日：2014-01-23
发明人： Tetsuo Yoshida , Yoshiro Tajitsu , Atsuko Kato
IPC分类号： H01L41/09 , H01L41/083 , H01L41/193 , H04R17/00 , H01L41/277 , H01L41/047 , H01L41/053 , H04R7/04
CPC分类号： H01L41/09 , H01L41/0471 , H01L41/0536 , H01L41/083 , H01L41/193 , H01L41/277 , H04R7/04 , H04R17/005
摘要： The invention relates to a piezoelectric vibrator having a piezoelectric laminate in which oriented film layers made of a polylactic acid and conductive layers are laminated alternately and grippers gripping both ends of the piezoelectric laminate, wherein one of two conductive layers neighboring via an oriented film layer is short-circuited to a negative electrode and the other conductive layer is short-circuited to a positive electrode, the oriented film layers interposed between the respective conductive layers are laminated such that the oriented film layers expand and contract in the same direction when a current is applied, the piezoelectric laminate has two parallel surfaces which are parallel to the plane direction of the oriented film layers and two end faces A and B which are between the parallel surfaces and parallel to each other, and the gripped ends respectively include the end face A and the end face B.
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3.发明授权公开(公告)号：US09937688B2
公开(公告)日：2018-04-10
申请号：US15036076
申请日：2014-12-03
发明人： Tetsuo Yoshida , Yoshiro Tajitsu , Atsuko Kato , Tomoka Yoshimura
IPC分类号： B32B27/08 , B32B27/36 , B32B37/15 , H01L41/45 , H01L41/193 , H01L41/333 , B29C47/00 , B29C47/06 , H01L41/113 , H01L41/09 , B29K67/00
CPC分类号： B32B27/08 , B29C47/0004 , B29C47/0021 , B29C47/0066 , B29C47/065 , B29K2067/046 , B32B27/36 , B32B37/153 , B32B2307/20 , B32B2307/516 , B32B2307/72 , B32B2457/00 , H01L41/0986 , H01L41/113 , H01L41/193 , H01L41/333 , H01L41/45
摘要： The object of the present invention is to provide a laminated film made of polylactic acids which is not prone to delamination while having excellent piezoelectric properties and a manufacturing method thereof. That is, the present invention is obtained by the stretched laminated film manufactured by a co-extrusion process for use in piezoelectric polymer materials, containing a layer (A) which has poly-L-lactic acid as the primary component and contains an impact modifier in the range of 0.1 to 10 mass % and a layer (B) which has poly-D-lactic acid as the primary component and contains an impact modifier in the range of 0.1 to 10 mass %.
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