Title:
PIEZOELECTRIC FILM LAMINATE AND BENDING DETECTION SENSOR
Document Type and Number:
WIPO Patent Application WO/2016/027613
Kind Code:
A1
Abstract:
Provided is a piezoelectric film laminate that is only made to generate charge by the displacement of the surface of an object of detection in the direction of a normal to the surface of the object of detection and for which charge generation resulting from displacement in a planar direction of the surface of the object of detection is unlikely to occur. In a biological sensor (100), even if the displacement in a planar direction (width direction or depth direction) of skin (901) at a sensor element (10) attachment location causes a film (3) and a film (4) to expand or contract more than a film (1) and a film (2), because the charge directions of film (3) and film (4) are opposite from each other and the charge directions of film (1) and film (2) are opposite from each other, the potential difference between a signal electrode (6) and reference potential electrode (7) is small, and it is possible to avoid mistakenly detecting expansion or contraction along a planar direction of the surface of the skin (901) as rising or falling of the surface of the skin (901).
Inventors:
KAWAMURA HIDEKI (JP)
Application Number:
PCT/JP2015/071059
Publication Date:
February 25, 2016
Filing Date:
July 24, 2015
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G01B7/16; B32B15/09; B32B27/36; H01L41/047; H01L41/113; H01L41/193; H01L41/333; H01L41/45
Domestic Patent References:
| WO2012137897A1 | 2012-10-11 |
Foreign References:
| JPS5299869A | 1977-08-22 | |||
| JP2011243606A | 2011-12-01 | |||
| JP2014086703A | 2014-05-12 | |||
| JPH0862242A | 1996-03-08 | |||
| JPH02179430A | 1990-07-12 |
Attorney, Agent or Firm:
Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
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