Diffusion barrier coatings having graded compositions and devices incorporating the same
AssigneeGeneral Electric Company
InventorsMarc Schaepkens, Kevin Warner Flanagan
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Abstract
A composite article comprises a substrate having at least a substrate surface and a graded-composition coating disposed on a substrate surface. The composition of the coating material varies substantially continuously across its thickness. The coating reduces the transmission rates of oxygen, water vapor, and other chemical species through the substrate such that the composite article can be used effectively as a diffusion barrier to protect chemically sensitive devices or materials. An organic light-emitting device incorporates such a composite article to provide an extended life thereto.
Claims10
A device assembly comprising a device disposed on a flexible substantially transparent substrate, said substrate having a first substrate surface and a second substrate surface, at least one of said substrate surfaces being coated with a graded-composition barrier coating comprising an inorganic and an organic material, a composition of which varies substantially continuous across a thickness thereof wherein the composition of said graded-composition barrier coating varies across a thickness thereof such that a graph of the percent composition of one of the components of the coating versus the depth of the coating has plural peaks.
A device assembly comprising a device, at least a surface of which is coated with a graded-composition barrier coating comprising an inorganic and an organic material, a composition of which varies across a thickness thereof wherein the composition of said coating material varies across a thickness thereof such that a graph of the percent composition of one of the components of the coating versus the depth of the coating has plural peaks.
Dependencies are inferred from the claim text.