Patent ID: 6750101
Filing Date: 2004-06-15
Classification: G11C,H01L

Abstract:
A method for manufacturing a memory device, comprising:forming a multi-layer film on a surface of a substrate, the multi-layer film including a first conductor layer, a layer or layers of material selected for formation of a selection device, and a layer or layers of material selected for formation of a phase change memory element; etching gaps into the multi-layer stack in a pattern to define a first plurality of lines extending in a first direction, wherein said gaps between the first plurality of lines extend through multi-layer film on the substrate; filling said gaps between lines in the first plurality of lines with an insulating material; forming a second conductive layer over the first plurality of lines and insulating material to form a multi-layer composite; and etching gaps into the multi-layer composite in a pattern to define a second plurality of lines extending in a second direction so that the first and second pluralities of lines intersect, wherein said gaps between the second plurality of lines extend through the multi-layer composite to the first conductor layer, and self-aligned stacks including remaining portions of said layer or layers of material selected for formation of a selection device, and layer or layers of material selected for formation of a phase change memory element, extending between lines in the first plurality of lines formed by the first conductive layer and lines in the second plurality of lines formed by the second conductive layer.