Patent ID: 7692226

Claim:
A complementary metal-oxide semiconductor (CMOS) image sensor comprising: a photodiode; and a plurality of transistors configured to transfer charges accumulated at the photodiode to one column line; wherein at least one transistor among the plurality of transistors has a source region whose width is greater than that of a drain region adjacent to a gate electrode, wherein the plurality of transistors includes: a transfer transistor configured to switch charges accumulated at the photodiode to a floating diffusion region; a reset transistor configured to reset the floating diffusion region to a reset voltage; a drive transistor configured to amplify and output the charges accumulated at the floating diffusion region; and a select transistor configured to switch the signal amplified through the drive transistor to transfer the amplified signal to the column line; and wherein a source region of the drive transistor is configured to act as a drain region of the select transistor.