Patent ID: 7259364
Filing Date: 2007-08-21
Classification: H01L

Abstract:
1. A method for producing image sensors based on TFA technology, with an amorphous thin-layer system comprising a thin layer material to form photodiodes that was applied on a crystalline ASIC, which incorporates transistor structures that are used to control photodiode function and linked with the photodiodes via signal collection nodes, wherein the photodiodes in the thin-layer material arranged pixel by pixel are each linked via back electrodes with transistor structures in the crystalline ASIC, which have an especially low leakage current by providing a signal collection node which combines all photocurrents and leakage currents into a pixel signal, along with all elements linked thereto and by providing a pixel structure with a reset transistor formed in a crystalline substrate and drain and source diffusion regions and a gate separated from adjacent structures by an insulating layer; wherein in that implantation geometries of the transistor structures are altered in such a way that a photodiode is incorporated into each pixel to realize a lower leakage current.