Patent Number: 7,820,236

Title: Optical film coating

Abstract: A low fringing film coating includes a transparent polymeric layer having a surface, and a plurality of projections extending away from the surface. The projections have a mean height of 0.05 to 1 .mu.m and a mean distance between projections of 0.5 to 2 mm. The coating can be produced by coating a polymeric composition onto a substrate. The polymeric composition includes a polymeric material, a good solvent for the polymeric material and a poor solvent or the polymeric material. The solvents are at least partially evaporated to form a low fringing transparent polymeric layer.

Inventors: Pokorny; Richard J. (Maplewood, MN), Yapel; Robert A. (Oakdale, MN), Balich; Jason W. (Beverly, MA)

Assignee: 3M Innovative Properties Company

International Classification: B05D 5/06 (20060101)

Expiration Date: 2018-10-26 0:00:00