Polyimide, laminate, and electronic device including same
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United States of America Patent
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Feb 13, 2024
Grant Date -
Jun 10, 2021
app pub date -
Apr 19, 2019
filing date -
Apr 20, 2018
priority date (Note) -
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Abstract
A flexible electronic device containing a polyimide film exhibiting excellent C-V characteristics. The polyimide film is a film that shows a maximum gradient of 0.005/V or more in a capacitance-voltage measurement of a laminate in which a polyimide film having a film thickness of 0.75 μm is formed on a silicon wafer having a resistance value of 4 Ωcm; the maximum gradient meaning a maximum value of an absolute value of a gradient in a normalized capacity-voltage curve during a third scan of forward direction scans; a capacity-voltage curve being measured by applying a direct current voltage is to the polyimide film with respect to the silicon wafer between a lowest voltage V1 and a highest voltage V2, and measuring capacitance while the direct current voltage is scanned in a forward direction and scanned in a negative direction; the normalized capacity-voltage curve being normalized so that the capacity at the lowest voltage V1 is 1.
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