Patent ID: 8304822
Filing Date: 2012-11-06
Classification: H01L

Abstract:
1. A pixel of an image sensor, said pixel comprising: a photodiode having a P-type diffusion area and an N-type diffusion area that are joined in a longitudinal direction; and a pass transistor having a first terminal that is the joined P-type diffusion area and the N-type diffusion area, a second terminal that is a floating diffusion area, and a gate terminal electrically connected to the first terminal and the second terminal, wherein said photodiode and said pass transistor are formed on a substrate, which are surrounded by a plurality of trenches filled with an insulator, and wherein each of the trenches consists a substrate bridge formed at a first depth and an exposed region formed at a second depth of the substrate of which the substrate bridge provides an electrical connection to an adjacent pixel and the exposed region is used to electrically insulate the pixel from its adjacent pixel.