Patent ID: 7862732

Claim:
A method for forming micro lenses comprising the steps of: (a) forming a lens material layer made of an inorganic material on a substrate; (b) forming an intermediate layer made of an organic material on the lens material layer; (c) forming a mask layer made of an organic material on the intermediate layer; (d) forming lens shapes in the mask layer; (e) transcribing the lens shapes of the mask layer to the intermediate layer by etching the mask layer and the intermediate layer while using a processing gas containing CF 4 and C 4 F 8 gas; and (f) transcribing the lens shapes of the intermediate layer to the lens material layer to form micro lenses by etching the intermediate layer and the lens material layer while using a processing gas containing SF 6 gas and CHF 3 gas, wherein the mask layer and the intermediate layer are separate layers.