Patterned articles and light emitting devices therefrom

A patterned article, comprising:

• a substrate support including planar substrate surface portions comprising a substrate material having a substrate refractive index;
• a patterned top surface on said substrate support including a plurality of features lateral to said planar substrate surface portions protruding above a height of said planar substrate surface portions,
• wherein at least a top surface of said plurality of features include an epi-blocking layer including a (i) non-single crystal material having a refractive index lower as compared to said substrate refractive index or (ii) a reflecting metal or a metal alloy (reflecting material), and wherein said epi-blocking layer is not on said planar substrate surface portions.

A method of forming a patterned article, comprising:

• providing a substrate support including planar substrate surface portions comprising a substrate material having a substrate refractive index;
• depositing an epi-blocking layer including at least one of (i) a non-single crystal material having a refractive index lower as compared to said substrate refractive index and (ii) a reflecting metal or a metal alloy (reflecting material) on said substrate support, and
• patterning said epi-blocking layer to form a patterned top surface on said substrate support including a plurality of features lateral to said planar substrate surface portions and protruding above said planar substrate surface portions, wherein at least a top surface of said plurality of features include said epi-blocking layer, and wherein said epi-blocking layer is not on said planar substrate surface portions.