Patent ID: 7298072
Filing Date: 2007-11-20
Classification: H01L

Abstract:
1. A transparent support substrate for an organic light emitting device comprising: i) an organic polymer support film, and ii) a composite layer on said support film, said composite layer being adapted to be disposed between said support film and light emitting organic diodes of an organic light emitting device, said composite layer comprising first and second discrete coating layers bonded together in opposed facing relationship, each of said first and second coating layers being impermeable to oxygen and water vapor when formed as a continuous coating, each of said first and second coating layers having inadvertent discontinuities therein such that said coating layers exhibit discontinuity-controlled permeation of oxygen and water vapor therethrough, said first and second coating layers being bonded together with an adhesive layer having a thickness of 50 nm to 10 μm such that said coating layers are spaced apart by a distance less than the dimensions of the inadvertent discontinuities in said coating layers, said inadvertent discontinuities being selected from: