Patent ID: 7932534

Claim:
A method for forming a solid state light source, comprising: providing a substrate having a top surface and a bottom surface; forming at least one optically active layer on said top surface of said substrate, and applying chemical-mechanical fabrication (CMF) processing to at least one of said top surface before said forming said optically active layer, said bottom surface, said optically active layer or an emission surface on said optically active layer to form a patterned surface, said patterned surface comprising a plurality of tilted surface features that have a post-CMF high elevation portion and a post-CMF low elevation portion that defines a height (h), and wherein said plurality of tilted surface features define a minimum lateral dimension (r); wherein said plurality of tilted surface features comprise at least one surface portion having a surface tilt angle from 3 to 85 degrees, wherein said patterned surface has a surface roughness <10 nm rms, and wherein said h/said r≧0.05.