Patent ID: 6660553
Filing Date: 2003-12-09
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising the steps of:(a) preparing a substrate; (b) forming a gate structure on a main surface of said substrate; (c) forming a mask member having an opening over an end portion of said gate structure and over a specified region of said main surface adjacent to said end portion; (d) implanting impurities from an almost vertical direction with respect to said main surface using said mask member as an implantation mask under conditions that said impurities can penetrate through a film thickness of said gate structure, thereby forming a first impurity-introduced region of a first conductivity type functioning as one electrode of a photodiode in said main surface under said end portion and in said specified region; (e) forming a second impurity-introduced region of a second conductivity type functioning as the other electrode of said photodiode in said specified region; and (f) forming a third impurity-introduced region of said first conductivity type in said main surface to be opposite to said first impurity-introduced region with said gate structure interposed therebetween.