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Title:
HIGH-POLYMER PIEZOELECTRIC MATERIAL, AND METHOD FOR MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP2014093487
Kind Code:
A
Abstract:

To provide a high-polymer piezoelectric material which is improved in production efficiency without making a large sacrifice in transparency.

A high-polymer piezoelectric material comprises an optically active helical chiral polymer molecule having a weight-average molecular weight of 50,000-1,000,000, and a crystal nucleus material. In the high-polymer piezoelectric material, the degree of crystallization is 20-80% according to DSC method. The transmission haze to visible light is equal to or smaller than 40%. The product of standardized molecular orientation MORc and the degree of crystallization is 40-700 when the reference thickness measured by means of a microwave transmission molecular orientation meter is 50 μm. The melting point Tma of the helical chiral polymer molecule, and the melting point Tmb of the crystal nucleus material satisfy the expression (1) below. The absolute value of the difference between the solubility parameter SPa(unit: (J/cm3)1/2) of the helical chiral polymer molecule, and the solubility parameter SPb(unit: (J/cm3)1/2) of the crystal nucleus material is 5 or less. Expression(1): Tmb≤Tma+70°C.


Inventors:
Tanimoto, Kazuhiro
Hamazaki, Hirohide
Takedate, Masahiro
Nishikawa, Shigeo
Application Number:
JP2012000244724
Publication Date:
May 19, 2014
Filing Date:
November 06, 2012
Export Citation:
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Assignee:
MITSUI CHEMICALS INC
International Classes:
H01L41/193; H01L41/08; H01L41/45
Domestic Patent References:
JP2010280910A2010-12-16
JP2010001338A2010-01-07
JP2009179773A2009-08-13
Foreign References:
WO2012026494A12012-03-01
Attorney, Agent or Firm:
中島 淳
加藤 和詳
福田 浩志



 
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