Patent ID: 7602461

Claim:
A method of manufacturing a diffusing reflector comprising the processes of: preparing a substrate; forming a first resin film having photosensitivity on said substrate; providing a gathering of adjacent pillar-shaped bodies isolated from each other through patterning of said resin film with photolithography; deforming gently said adjacent pillar-shaped bodies through a reflow; forming an uneven surface layer having the maximum inclination angle of under 120 by coating with a thin layer of a second resin said gently deformed pillar-shaped bodies; covering with the second resin open flat spaces located between said isolated adjacent pillar-shaped bodies to form one concave gap between any two adjacent isolated pillar-shaped bodies so that upper end portions of said any two adjacent isolated pillar-shaped bodies are higher than a lower end portion of said one concave gap in the thickness direction of the diffusing reflector, thereby minimizing an occurrence of a flat surface area on said substrate; and forming a metal film on said uneven surface layer, wherein, said first resin film is patterned by straight connected lines that form a continuous polygonal pattern, said straight connected lines providing a continuous and substantially uniform gap between any two of said adjacent polygonal pillar-shaped bodies thereby forming a rectilinear honeycomb-like pattern, said gap is substantially constant throughout the honeycomb-like pattern and has a size equal to about a minimum resolution of said photolithography, and a thickness of the second resin is about 500 nm.