Polymeric piezoelectric film and method for manufacturing thereof
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United States of America Patent
Stats
-
Jun 2, 2020
Grant Date -
Jan 25, 2018
app pub date -
Jan 28, 2016
filing date -
Feb 13, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A polymeric piezoelectric film, including a helical chiral polymer (A) having a weight average molecular weight of from 50,000 to 1,000,000 and optical activity, in which, in the film: a crystallinity given by a DSC method is from 20% to 80%; a standardized molecular orientation MORc is from 3.5 to 15.0 when a reference thickness measured by a microwave transmission-type molecular orientation meter is 50 μm; and when a direction parallel to a phase difference streak is a direction X, a direction perpendicular to the direction X and parallel to a main plane of a film is a direction Y, and the phase difference streak is evaluated by an evaluation method A, per a length of 1,000 mm in the direction Y, a number of phase difference streaks with an evaluation value of 60 or more is 0, and a sum of the evaluation values of phase difference streaks with an evaluation value of 20 or more is 1000 or less.
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International Classification(s)
- 2016 Application Filing Year
- H01L Class
- 27971 Applications Filed
- 23507 Patents Issued To-Date
- 84.05 % Issued To-Date
Cited Art Landscape
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- 0 Citation Count
- H01L Class
- 0 % this patent is cited more than
- 5 Age
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