Patent ID: 9070802
Filing Date: 2015-06-30
Classification: H01L

Abstract:
1. An image sensor, comprising: a first type epitaxial layer, formed on a first type substrate; a photodiode region, formed within the first type epitaxial layer; a first type well region, formed within the first type epitaxial layer with a first horizontal distance to the photodiode region and a vertical distance to a surface of the first type epitaxial layer; a gate region of a source follower transistor, formed on an oxide formed on the surface of the first type epitaxial layer and above the first type well region, having a second horizontal distance to the photodiode region; and a first type implant isolation region, formed within the first type epitaxial layer and between the first type well region and the photodiode region; wherein the first horizontal distance is longer than the second horizontal distance, and there is a distance between the first type implant isolation region and the first type well region as an anti-blooming path.