Patent ID: 8686482

Claim:
A complementary metal-oxide semiconductor (CMOS) image sensor (CIS), comprising: a substrate having a first surface and a second surface opposite to the first surface, the substrate including: an active pixel sensor (APS) array region, the APS array region including a photoelectric transformation element, and a peripheral circuit region; an insulating interlayer on the first surface of the substrate, the insulating interlayer including metal wirings electrically connected to the photoelectric transformation element; a light blocking layer on the peripheral circuit region of the second surface of the substrate, the light blocking layer exposing the APS array region and including a plurality of metal wiring patterns spaced apart from one another to form at least one drainage path along a boundary region between the APS array region and the peripheral circuit region; a color filter layer on the second surface of the substrate, the color filter layer covering the APS array region and the light blocking layer; and a microlens on the color filter layer on the APS array region.