Patent ID: 7608872

Claim:
A complementary metal oxide semiconductor (CMOS) image sensor, comprising: a first conductive type substrate including a trench; a channel stop layer formed by using a first conductive type epitaxial layer over an inner surface of the trench; a device isolation layer formed on the channel stop layer to fill the trench; a second conductive type photodiode formed in a portion of the substrate in one side of the channel stop layer; a transfer gate structure formed on the substrate adjacent to the photodiode to transfer photo-electrons generated from the photodiode; and a floating diffusion region formed in a portion of the substrate opposite to the photodiode and adjacent to the transfer gate structure to receive the photo-electrons from the transfer gate structure, wherein bottom portions of the channel stop Layer are located in a deeper position from the surface of the first conductive type substrate than bottom portions of the second conductive type photodiode.