Patent ID: 7824954
Filing Date: 2010-11-02
Classification: H01L,Y10S

Abstract:
1. A method of fabricating a phase change memory device, comprising: forming line-shaped or L-shaped bottom electrodes in contact with respective bottom patterns on a substrate and having top surfaces defined by dimensions in x and y axes directions on the substrate, wherein the dimension along the x-axis of the top surface of the bottom electrodes has less width than a resolution limit of a photolithography process used to fabricate the phase change memory device; forming phase change patterns in contact with the top surface of the bottom electrodes and having a greater width than each of the dimensions in the x and y axes directions of the top surface of the bottom electrodes; and forming top electrodes on the phase change patterns, wherein the line shape or the L shape represents a sectional line shape or a sectional L shape of the bottom electrodes in the x-axis direction.