Diffusion barrier coatings having graded compositions and devices incorporating the same
AssigneeGeneral Electric Company One Research Circle
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.
Claims33
1-57. (canceled)
An article comprising:
- a member having a surface;
- an organic light emitting diode (OLED) disposed on said surface;
- and
- a coating comprising a coating material a composition of which varies substantially continuously across a thickness of said coating, said coating disposed on said OLED and contacting said surface so as to encapsulate said OLED within said coating and said surface.
An article comprising:
- a layer having a surface;
- an organic light emitting diode (OLED) disposed on said surface;
- and
- a coating comprising a coating material a composition of which varies substantially continuously across a thickness of said coating, said coating disposed on said OLED and contacting said surface so as to encapsulate said OLED within said coating and said surface.
An article comprising:
- a coating comprising a coating material a composition of which varies substantially continuously across a thickness of said coating;
- and
- an organic light emitting diode (OLED) having a first surface in contact with a member and a second surface in contact with said coating.
Dependencies are inferred from the claim text.