Patent ID: 7601557

Claim:
A method of manufacturing an image sensor, comprising: providing a substrate defined with unit pixels; forming a seed microlens on the substrate, wherein a top surface of the seed microlens comprises a height difference between a first region of the seed microlens corresponding to one of the unit pixels and a second region of the seed microlens corresponding to an area between adjacent unit pixels; and forming a microlens by performing a blanket etching process on the seed microlens, wherein forming the seed microlens comprises: forming an inorganic layer on the substrate; selectively forming an ion implantation region in a portion of the inorganic layer corresponding to the area between adjacent unit pixels, wherein the forming of the ion implantation region comprises: forming a first photoresist pattern separated by a first gap exposing a first portion of the inorganic layer corresponding to a portion of the area between adjacent unit pixels, forming a second photoresist pattern on the first photoresist pattern, the second photoresist pattern being separated by a second gap exposing at least the first gap of the first photoresist pattern, and implanting ions into the inorganic layer using both the first and the second photoresist patterns as a mask; and removing the ion implantation region to form a lens gap hole in the inorganic layer, wherein the lens gap hole creates the height difference of the top surface of the seed microlens.