Patent ID: 7375019
Filing Date: 2008-05-20
Classification: H01L

Abstract:
1. A method for fabricating an image sensor comprising: forming a photodiode and a transistor having an impurity diffusion layer being electrically connected with the photodiode, in an active area of a semiconductor substrate; forming an impurity implantation layer on the substrate including a portion of the impurity diffusion layer; selectively implanting impurities only into a portion of the impurity implantation layer covering the portion of the impurity diffusion layer; forming an insulating interlayer above the semiconductor substrate, the insulating interlayer for covering the photodiode, the transistor, and the impurity implantation layer; selectively opening the insulating interlayer to expose the impurity implantation layer; and forming a contact plug for electrically connecting the impurity implantation layer of the opened area with a metal layer provided above the insulation interlayer.