Patent ID: 8766240

Claim:
A permeation barrier film structure for encapsulating an organic light emitting device, the permeation barrier film structure comprising: a bilayer stack having a hybrid permeation barrier composition that comprises a homogeneous mixture of a polymeric material and a non-polymeric material, the bilayer stack comprising: a first region directly deposited on the organic light emitting device, wherein the first region having a first composition that is a homogeneous mixture of a polymeric material and a non-polymeric material and having a first CF 4 —O 2 Plasma Reactive Ion Etch Rate; and a second region deposited on the first region, wherein the second region having a second composition that is a homogeneous mixture of said polymeric material and said non-polymeric material and having a second CF 4 —O 2 Plasma Reactive Ion Etch Rate, wherein the second CF 4 —O 2 Plasma Reactive Ion Etch Rate is greater than the first CF 4 —O 2 Plasma Reactive Ion Etch Rate by a factor greater than 1.2, wherein the first region having a maximum thickness of 1000 nm ±10 nm.