2×2 ARRAY ARRANGEMENT BASED ON COMPOSITE DIELECTRIC GRATING LIGHT-SENSITIVE DETECTOR AND WORKING METHOD

摘要

Disclosed in the present invention are a 2×2 array arrangement based on a composite dielectric grating light-sensitive detector and a working method. An array consists of four pixels, and each pixel comprises a light-sensitive transistor and a read transistor, which are formed above a p-type semiconductor substrate and use a composite dielectric grating structure; the substrates of four read transistors are connected to form a regular octagon ring structure and located in the center of the array; in four sides of the regular octagon ring structure, the substrates that are not covered with a composite dielectric grating form four heavily doped N+ regions, of which every two regions are opposite to each other, forming right angles, wherein two opposite heavily doped N+ regions are connected to each other to form a shared N+ source, and the other two are connected to each other to form a shared N+ drain; four light-sensitive transistors are located at the outer side of the regular octagon ring structure and located at the sides of four regions that are not heavily n-doped. The present invention can significantly improve the filling coefficient of the light-sensitive detector, achieves a high full-well charge capacity, is compatible with floating gate CMOS process, and is easy to implement.