Patent ID: 8536560
Filing Date: 2013-09-17
Classification: G11C,H01C,H01L

Abstract:
1. A manufacturing method of a variable resistance device, comprising: forming an insulating layer on a substrate and then forming a through-hole in the insulating layer to expose a portion of a top surface of the substrate; forming a flat first electrode composed of a conductive material at a base of the through-hole; forming a solid electrolyte layer to a thickness along an outline of the through-hole using atomic layer deposition (ALD) so that a region with a low height is at a center of the solid electrolyte layer; forming a second electrode composed of a conductive material filling the region with the low height of the solid electrolyte layer so that a top surface of a resultant structure is planar; and removing entire portions of the solid electrolyte layer and the second electrode that are outside of the through-hole, respectively.