Patent ID: 7993985

Claim:
A method for forming a semiconductor device with a single-sided buried strap, comprising: providing a substrate with a trench; forming a first dielectric layer on a sidewall of a higher portion of the trench; filling a first conductive layer into the trench to be adjacent to the first dielectric layer; forming a second dielectric layer on the first dielectric layer and the first conductive layer; forming a plurality of gate structures on the substrate, wherein one of the gate structures on the second dielectric layer is offset for a distance from the second dielectric layer; removing a portion of the second dielectric layer and a portion of the first dielectric layer to form an opening by using the gate structure as a mask; forming a second conductive layer in the opening to electrically couple to the first conductive layer, wherein the second conductive layer is the single sided buried strap; and forming a source/drain region adjacent to the gate structure and the single sided buried strap.