Patent ID: 6207574
Filing Date: 2001-03-27
Classification: H01L

Abstract:
A method for fabricating a dynamic random access memory device comprising:forming a first insulating layer on a semiconductor substrate;forming a contact plug in the first insulating layer to be electrically connected to the semiconductor substrate;forming a second insulating layer, a material layer, and a third insulating layer on the first insulating layer including the contact plug;etching the third insulating layer, the material layer, and the second insulating layer using at least one etchant to form an opening exposing the contact plug;forming a storage node in the opening;etching the third insulating layer to expose a top surface of the material layer around the storage node, the material layer preventing the etchant of the third insulating layer from etching the first or the second insulating layer; andetching the material layer to expose a top surface of the second insulating layer around the storage node.