Patent ID: 6620672
Filing Date: 2003-09-16
Classification: H01L

Abstract:
A semiconductor device, comprising:a substrate with a first and a second side, said first side being opposite said second side; an access transistor formed on one of said first and second sides of said substrate, said access transistor comprising source and drain regions in a semiconductor material layer of said substrate and at least one gate stack including a gate region electrically connected with a word line; at least one capacitor on said first side of said substrate and electrically connected to one of said source and drain regions; at least one bit line conductor on said second side of said substrate and electrically connected to a different one of said source and drain regions from said capacitor; and at least one self-aligned contact plug connecting at least one of said bit line conductor and said capacitor with the respective source and drain region of said access transistor, wherein said contact plug is separated from said gate stack by a width of a spacer film overlying at least a part of said gate stack.