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Title:
VARIABLE CAPACITANCE CAPACITOR ELEMENT
Document Type and Number:
Japanese Patent JP2013258224
Kind Code:
A
Abstract:

To provide a variable capacitance capacitor having capacitance that largely changes due to application of DC bias voltage in an embodiment of the present invention, and having a capacitance value that changes in a small amount over time when the application of the DC bias voltage is continued.

A variable capacitance capacitor element 50 according to an embodiment of the present invention includes a support substrate 51, a first electrode layer 59 provided on the support substrate 51, a second electrode layer 60 provided to face the first electrode layer, and a dielectric layer 61 arranged between the first electrode layer 59 and the second electrode layer 60. In one aspect, the dielectric layer 61 has a main component represented by the composition formula Ba1-xSrxTiO3 (0.5≤x≤0.8), and a thickness equal to or less than 200 nm.


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Inventors:
ISHII DAIKI
IKENAGA MICHIKAZU
NAKAMURA KENTARO
Application Number:
JP2012132595A
Publication Date:
December 26, 2013
Filing Date:
June 12, 2012
Export Citation:
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Assignee:
TAIYO YUDEN KK
International Classes:
H01G7/06
Domestic Patent References:
JP2006049840A2006-02-16
JPH10256085A1998-09-25
JP2011119482A2011-06-16
JP2010055570A2010-03-11
JP2007227798A2007-09-06
Foreign References:
WO2008149622A12008-12-11
Attorney, Agent or Firm:
Satoshi Murakoshi
Hidehiko Ichikawa



 
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