Patent ID: 6124173
Filing Date: 2000-09-26
Classification: H01L

Abstract:
A method for providing source/drain contact areas, said method comprising:providing a semiconductor substrate having a space charge of a first polarity, said semiconductor substrate having a surface;forming a gate stack including a gate on said surface of said semiconductor substrate;performing an angled implant of a first species into said semiconductor substrate at a location adjacent said gate stack to dope with said first species a first region of said semiconductor substrate resulting in a space charge in said first region having a second polarity opposite said first polarity;performing an angled implant of a second species into said semiconductor substrate at said location to dope with said second species a second region of said semiconductor substrate resulting in a space charge in said second region having said first polarity;forming spacers laterally enclosing said gate stack; andperforming an angled implant of a third species into said semiconductor substrate at said location to dope with said third species a third region of said semiconductor substrate resulting in a space charge in said third region having said second polarity, wherein:said semiconductor substrate includes a remainder thereof that is separate from said first, second, and third regions;said third region is separated from contact with said first region by said second region; andboth of said second region and said third region are separated from contact with the remainder of said semiconductor substrate by said first region; andan uppermost portion of said third region coincides with a first source/drain contact area on said surface of said semiconductor substrate.