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Title:
PIEZOELECTRIC TRANSFORMER
Document Type and Number:
WIPO Patent Application WO/2018/012443
Kind Code:
A1
Abstract:
A piezoelectric transformer (101) is provided with a base (1), and an upper layer (15) supported by the base (1). The upper layer (15) includes a first piezoelectric layer (3) disposed so as to include a portion sandwiched by an output electrode (2) and an intermediate electrode (4), and a second piezoelectric layer (5) disposed so as to include a portion sandwiched by the intermediate electrode (4) and an input electrode (6) at each of at least n vibration units (9a to 9d) while being disposed so as to overlap the first piezoelectric layer (3). The input electrode (6) includes input electrode pieces (6a to 6d), and the output electrode (2) includes output electrode pieces (2a to 2d). The second piezoelectric layer (5) is polarized in a fixed direction. The input electrode pieces (6a to 6d) are wired such that it is possible to apply, to each of a first input electrode piece group and a second input electrode piece group, a voltage that will have a reverse phase with reference to the electric potential of the intermediate electrode (4).

Inventors:
IKEUCHI SHINSUKE (JP)
MOCHIDA YOICHI (JP)
YAMAMOTO KANSHO (JP)
HADA TAKUO (JP)
HORIUCHI HIDEYA (JP)
Application Number:
PCT/JP2017/025076
Publication Date:
January 18, 2018
Filing Date:
July 10, 2017
Export Citation:
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Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01L41/047; H01L41/107; H01L41/187; H02M3/24; H04R17/00
Domestic Patent References:
WO2014097681A12014-06-26
Foreign References:
JPH027584A1990-01-11
JP2010156704A2010-07-15
JP2009225503A2009-10-01
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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