Patent ID: 7579625
Filing Date: 2009-08-25
Classification: H01L

Abstract:
1. A CMOS image sensor, comprising: a plurality of photodiodes formed on a semiconductor substrate; an interlayer dielectric layer formed on the semiconductor substrate having the plurality of photodiodes; color filter layers comprising a multi-layered blue color filter layer formed on the interlayer dielectric layer corresponding to respective photodiodes of the plurality of photodiodes on the interlayer dielectric layer, wherein the multi-layered blue color filter layer comprises a first blue color filter layer formed on the interlayer dielectric layer and a second blue color filter layer formed on the first blue color filter layer, wherein the first blue color filter layer is above the semiconductor substrate and the second blue color filter layer is above the first blue color filter layer, wherein a width of the second blue color filter layer is smaller than that of the first blue color filter layer; a planarization layer formed on the semiconductor substrate having the color filter layers; and microlenses formed on the planarization layer.