Patent ID: 6150267
Filing Date: 2000-11-21
Classification: H01L

Abstract:
A method of manufacturing a buried contact window of an SRAM, comprising the steps of:providing a substrate, wherein the substrate has a device isolation structure;forming an oxide layer and a first conductive layer over the substrate;patterning the first conductive layer to form a first opening in a buried contact window region, wherein the first opening exposes the substrate in the buried contact window region;patterning an area within the buried contact window region adjacent to one side of a desired source/drain region, and then performing a first ion implantation in that area;forming a second conductive layer, wherein the second conductive layer connects electrically with the substrate through the first opening;patterning the second conductive layer to form a conductive line and a gate together with a second opening between the conductive line and the gate such that the second opening exposes the desired source/drain region and a portion of the buried ion-doped contact window region; andperforming a second ion implantation implanting ions into the substrate through the second opening to form a buried contact window and a source/drain region.