FLEXIBLE ELECTRONIC ELEMENT SUBSTRATE, ORGANIC THIN FILM SOLAR CELL, LAMINATED STRUCTURE AND METHOD FOR MANUFACTURING THE SAME, AND METHOD FOR MANUFACTURING FLEXIBLE ELECTRONIC ELEMENT
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United States of America Patent
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Oct 21, 2021
app pub date -
Mar 4, 2019
filing date -
Aug 2, 2018
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Abstract
The present invention addresses the problem of providing a flexible electronic element substrate comprising a polyimide layer that has both low ultraviolet transmittance and high visible light transmittance and that is capable of suppressing ultraviolet degradation without any reduction in the performance of an electronic element. In order to solve this problem, the flexible electronic element substrate comprises a polyimide layer that satisfies all of (1) through (3) below: (1) maximum transmittance at a wavelength of 400±5 nm is 70% or higher at a thickness of 5 μm; (2) the b* value in an L*a*b* color system is 5 or less at a thickness of 5 μm; and (3) transmittance of light at a wavelength of 350 nm is 10% or less at a thickness of 5 μm.
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