Substrate for fabricating light emitting device and light emitting device fabricated therefrom

A patterned substrate for fabricating a light emitting device having an improved surface structure, comprising:

• at least one platform region having a first facet direction for epitaxial growth;
• and
• a plurality of directly adjacent protruded portions surrounding the at least one platform region to isolate the at least one platform region from another platform region, each directly adjacent protruded portion having a scattering surface and a vertex,
• wherein each facet direction of the scattering surface of the plurality of directly adjacent protruded portions is substantially excluded from first facet direction,
• wherein in top view of the area of the directly adjacent protruded portion for scattering light is larger than the area of the platform region for epitaxial growth.

A patterned substrate for fabricating a light emitting device having an improved surface structure, comprising:

• at least one platform region serving as a primary platform for epitaxial growth;
• and
• a plurality of directly adjacent protruded portions surrounding the at least one platform region to isolate the at least one platform region from another platform region, each directly adjacent protruded portion having a scattering surface and a vertex,
• wherein at least one unit region is surrounded by the vertexs or lines between the adjacent vertexs of the plural directly adjacent protruded portions, an area of the unit region consists of an area of the protruded portions and an area of the platform region, the area of the protruded portion is larger than the area of the platform region.