Solution-applied antireflective coatings
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United States of America Patent
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Dec 22, 1992
Grant Date -
N/A
app pub date -
Sep 14, 1988
filing date -
Sep 14, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A three-layer antireflective coating composition for a CR-39 or glass substrate comprising a middle layer containing titanium compounds sandwiched between top and bottom layers containing polysiloxane, wherein the top and bottom layers are titanium-free; and a process for preparing said antireflective coating with improved adhesion on a CR-39 or glass substrate. The thicknesses of each of said coating layers is in accordance with preselected equations, and the refractive indices of said coating layers satisfy the following requirements: n.sub.m >n.sub.b, n.sub.m >n.sub.t, and n.sub.b .ltoreq.n.sub.s wherein n.sub.m is the refractive index of the middle layer, n.sub.b is the refractive index of the bottom layer, n.sub.t is the refractive index of the top layer, and n.sub.s is the refractive index of the CR-39 or glass substrate.
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