Patent ID: 7803653
Filing Date: 2010-09-28
Classification: H01L

Abstract:
1. A method of manufacturing an image sensor, the method comprising: forming a device isolation region in an active pixel sensor area of a semiconductor substrate and alignment keys in a scribe lane area of the semiconductor substrate, such that the depth of the alignment keys is equal to or shallower than the depth of the device isolation region; forming a photoelectric converter in the active pixel sensor area; polishing a rear surface of the semiconductor substrate; and using the alignment keys to form a microlens at a position corresponding to the photoelectric converter on the polished rear surface of the semiconductor substrate, wherein the using of the alignment keys comprises: forming a mask pattern for opening the scribe lane area on the entire polished rear surface of the semiconductor substrate; and etching the polished rear surface of the semiconductor substrate using the mask pattern to expose the alignment keys.