MULTI-LAYER FILM FOR USE AS A SOLAR CELL SUBSTRATE
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United States of America Patent
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Issued Date -
Jul 1, 2010
app pub date -
May 23, 2008
filing date -
May 23, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A multi-layer film for use as a solar cell substrate, consisting of a supporting layer (s) and a scattering layer (s), wherein the supporting layer comprises a thermoplastic crystalline resin, the scattering layer comprises a thermoplastic crystalline resin and particles having a different refractive index from the refractive index of the thermoplastic crystalline resin, the content of the particles in the scattering layer is 0.05 to 20 vol % based on the volume of the scattering layer, the absolute value of the difference between the refractive index of the particles contained in the scattering layer and the refractive index of the thermoplastic crystalline resin in the scattering layer is 0.01 to 1.00, the both surfaces of the multi-layer film have a center line average surface roughness Ra of not more than 50 nm, and the multi-layer film has a total light transmittance Tt of not less than 80% and a haze ratio of not less than 8%.
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