Patent ID: 8624310
Filing Date: 2014-01-07
Classification: H01L

Abstract:
1. An image sensor, comprising: a substrate including a light-receiving region and a non-light-receiving region defined in the substrate; a transfer gate formed on the non-light-receiving region and spacers formed on both side walls of the transfer gate; an n-type first dopant region of a pinned photodiode formed in the light-receiving region; a p-type second dopant region of the pinned photodiode formed on a surface of the light-receiving region, the second dopant region of the pinned photodiode including, a plurality of negative-channel metal-oxide semiconductor (NMOS) transistors provided to the non-light-receiving region, wherein the NMOS transistors include source, drain, or source and drain regions including n-type and p-type dopants, the source, drain, or source and drain regions are not formed in a well, the n-type dopant has a concentration higher than the p-type dopant, and the substrate includes, the well has same conductivity with the substrate and the epi layer has same conductivity with the substrate.