Patent ID: 7754544
Filing Date: 2010-07-13
Classification: H01L

Abstract:
1. A manufacturing method of a dynamic random access memory cell, comprising: providing a substrate; forming a bottom oxide layer and a semiconductor layer on the substrate, wherein the semiconductor layer is formed on the bottom oxide layer; forming a gate on the semiconductor layer; patterning the semiconductor layer to expose a portion of the bottom oxide layer; forming an insulation layer at the side walls of the semiconductor layer, wherein the height of the insulation layer is shorter than the height of the side walls of the semiconductor layer, so that a gap is formed between the tops of the semiconductor layer and the insulation layer; and forming a silicone layer on the bottom oxide layer to cover the insulation layer and a surface of the bottom oxide layer exposed after forming the insulation layer and doping the silicone layer to form a doping layer on the bottom oxide layer, wherein the doping layer has the same height with the semiconductor layer, and the doping layer contacts the side walls of the semiconductor layer via the gap.