Patent ID: 6555440
Filing Date: 2003-04-29
Classification: H01L,Y10S

Abstract:
A method of fabricating a diode device in a substrate having a top surface and a bottom surface, said method comprising the steps of:forming first and second active regions in said substrate such that said first and second active regions respectively have first and second conductivity types, including defining an area on said top surface for forming a pit and anisotropically etching a single pit into said area such that said pit extends partially through said substrate and has sidewalls which converge with approach toward said bottom surface, wherein forming said first active region includes introducing a dopant having said first conductivity type into said converging sidewalls of said pit, said first and second active regions being conductively coupled in response to a bias voltage; and forming a conductive material along said converging sidewalls of said pit, including forming the conductive material to be directly coupled to said first active region so that said bias voltage is applied to said first active region via said converging sidewalls.