Patent ID: 8846483
Filing Date: 2014-09-30
Classification: H01L

Abstract:
1. A method of manufacturing a phase change semiconductor device, comprising steps of: forming an insulating layer on a substrate; forming a metal layer on the insulating layer; forming a via hole penetrating from the metal layer to the insulating layer, wherein the metal layer is only outside the via hole; forming a phase change material layer on the metal layer and the via hole so as to at least fill up the via hole; and performing a planarization process, wherein the method further comprises a step of: after forming the metal layer and before forming the via hole, or after forming the via hole and before forming the phase change material layer, or after forming the phase change material layer and before performing the planarization process, subjecting the metal layer to an annealing treatment so as to form a metallic compound layer at an interface between the metal layer and the insulating layer.