Patent ID: 8222708
Filing Date: 2012-07-17
Classification: H01L

Abstract:
1. An image sensor, comprising: an insulating layer having at least one conductive interconnection and a connection hole to expose the conductive interconnection; a substrate disposed on the insulating layer and having a guide hole aligned with the connection hole; a diffusion layer disposed on the substrate, on sidewalls of the guide hole and on sidewalls of the connection hole, and under the connection hole; and an anti-reflection layer and an insulating spacer sequentially stacked in the guide hole and the connection hole to expose at least one of the diffusion layer and the conductive interconnection, wherein the guide hole and the connection hole constitute a pad hole, and wherein the substrate comprises a pixel array region having at least one photodiode and a peripheral circuit region having the pad hole, and the diffusion layer comprises impurity ions and is disposed in the pixel array region and in the peripheral circuit region.