Patent ID: 7709920
Filing Date: 2010-05-04
Classification: H01L

Abstract:
1. A photodiode arrangement, comprising: an insulating layer; and a silicon semiconductor layer having a plurality of portions with different thicknesses disposed on the insulating layer, wherein each of the portions of the silicon semiconductor layer has a low-concentration diffusion region formed by diffusing one of a P-type impurity or an N-type impurity therein with a low concentration, a P-type high-concentration diffusion region formed by diffusing a P-type impurity therein with a high concentration, and an N-type high-concentration diffusion region formed by diffusing an N-type impurity therein with a high concentration, wherein the P-type high-concentration diffusion region and the N-type high-concentration diffusion region formed in each portion of the silicon semiconductor layer are arranged to face each other, with the low-concentration diffusion region of the respective portion of the silicon semiconductor layer being interposed therebetween, and wherein the low concentration diffusion region of one of the portions of the silicon semiconductor layer has a thickness which is less than a predetermined thickness, and each of the P-type high-concentration diffusion region and the N-type high-concentration diffusion region of that portion has the predetermined thickness, which ranges from 30 nm to 50 nm.