Patent ID: 8513048
Filing Date: 2013-08-20
Classification: H01L

Abstract:
1. A method of manufacturing an image sensor comprising: forming an interlayer dielectric layer having a plurality of metal lines therein on a substrate having a photodiode therein; forming a pre-passivation layer on the interlayer dielectric layer; coating a photoresist on the pre-passivation layer; patterning the photoresist in a checkerboard pattern by removing the photoresist from alternating pixels; etching exposed areas of the pre-passivation layer using the photoresist pattern as a mask; forming a passivation layer on the interlayer dielectric layer, the passivation layer having a first thickness over a first pixel, a second thickness over a second pixel adjacent to the first pixel, and a step between the first and second pixels; forming a color filter layer on the passivation layer; and forming microlenses on the color filter layer.