Diffusion barrier coatings having graded compositions and devices incorporating the same
AssigneeGeneral Electric Company
InventorsMarc Schaepkens, Kevin 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.
Claims46
1-57. (canceled)
A method for making a composite article, said method comprising the steps of:
- providing a substrate having at least a substrate surface;
- and
- depositing a coating material on said substrate surface using plasma-enhanced chemical-vapor deposition.
A method of making an assembly comprising a device, said method comprising the steps of:
- providing a substrate having a first substrate surface and a second substrate surface;
- depositing a coating material on one of said substrate surfaces using plasma-enhanced chemical-vapor deposition;
- and
- disposing said device on said substrate.
Dependencies are inferred from the claim text.