Patent ID: 8722448
Filing Date: 2014-05-13
Classification: G02F,G06F,G09G,H01L

Abstract:
1. A method for fabricating a photo detector, comprising: providing a substrate having a transistor region and a photosensitive region; forming a first patterned semiconductor layer having a first crystal state on the transistor region of the substrate, wherein the first patterned semiconductor layer comprises a first doping region and a second doping region; covering a dielectric layer on the substrate and the first patterned semiconductor layer of the transistor region; forming a patterned conductive layer on the dielectric layer of the transistor region and the dielectric layer of the photosensitive region; covering an interlayer dielectric layer on the dielectric layer and the patterned conductive layer, wherein the interlayer dielectric layer comprises at least two openings to expose a portion of the first doping region and the second doping region of the first patterned semiconductor layer; forming a second patterned semiconductor layer having a second crystal state on the photosensitive region; forming two first electrodes on the interlayer dielectric layer and electrically connecting the first electrodes to the first patterned semiconductor layer; and forming two second electrodes on a portion of the second patterned semiconductor layer.