INTERMEDIATE BASE MATERIAL FILM AND TOUCH PANEL SENSOR
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Issued Date -
Apr 30, 2015
app pub date -
Oct 28, 2014
filing date -
Oct 28, 2013
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Abstract
There is provided an intermediate base material film including: a transparent base material; a transparent layer having a refractive index of from 1.47 to 1.57 and a film thickness of 1 μm or more; a high-refractive-index layer having a refractive index of from 1.62 to 1.72 and a film thickness of from 20 nm to 80 nm; and a low-refractive-index layer having a refractive index of from 1.44 to 1.54 and a film thickness from of 3 nm to 45 nm, wherein when the intermediate base material film is irradiated with light to determine a* and b* values in a L*a*b color system from reflected light toward each regular reflection direction, a variation of the a* values is 1.0 or less, and a variation of the b* values is 1.6 or less.
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