Simple process for anti-reflection coating with multiple metal films
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United States of America Patent
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Jun 29, 1999
Grant Date -
N/A
app pub date -
Dec 22, 1997
filing date -
Dec 22, 1997
priority date (Note) -
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Abstract
An anti-reflection screen filter is provided that includes four consecutively applied layers to a substrate. A first layer, furthest from the substrate, is arranged on an underlying second layer and comprises an oxide material having a refractive index within the approximating range of 1.46 to 1.50 at a wavelength of 520 nm. The second layer is arranged on an underlying third layer and is formed by a metal having a refractive index within the approximating range of 1.5 to 4.0 at a wavelength of 520 nm. The third layer is arranged on an underlying fourth layer and is formed by a metal having a refractive index within the approximating range of 0.2 to 1.4 at a wavelength of 520 nm. The fourth layer is disposed on the front surface of a substrate and is formed by a metal having a refractive index within the approximating range of 1.5 to 4.0 at a wavelength of 520 nm.
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