Patent ID: 7732801
Filing Date: 2010-06-08
Classification: H01L

Abstract:
1. A phase change memory device, comprising: a substrate; a first electrode layer formed on the substrate; a first phase change memory structure formed on the first electrode layer and electrically connected to the first electrode layer; a second phase change memory structure formed on the first phase change memory structure and electrically connected to the first phase change memory structure, wherein the first phase change memory structure or the second phase change memory structure comprises: a cup-shaped heating electrode disposed in a first dielectric layer; a first insulating layer disposed on the first dielectric layer along a first direction parallel to a side of the cup-shaped heating electrode and covering a portion of the cup-shaped heating electrode; a second dielectric layer disposed on the first insulating layer and the first dielectric layer; and a first electrode structure disposed in the second dielectric layer along a second direction parallel to another side of the cup-shaped heating electrode and covers a portion of the first insulating layer and the cup-shaped heating electrode, wherein the first electrode structure comprises a pair of phase change material spacers disposed on a pair of sidewalls of the first electrode structure and covering a portion of the cup-shaped heating electrode, thereby forming an intersectional contact area between one of the phase change material spacers and the cup-shaped heating electrode.