Patent ID: 7897424
Filing Date: 2011-03-01
Classification: H01L

Abstract:
1. A method of manufacturing a memory device, comprising: forming a bit line on a substrate; forming a preliminary reading word line over the bit line, wherein the preliminary reading word line is electrically insulated from the bit line; forming a bit line contact electrically connected to the bit line between adjacent preliminary reading word lines, wherein the bit line contact has an upper face substantially lower than an upper face of the preliminary reading word line; forming a preliminary contact tip over a central portion of the preliminary reading word line, wherein the preliminary contact tip is separated from the preliminary reading word line; forming a preliminary electrode on the bit line contact and the preliminary contact tip, wherein the preliminary electrode extends substantially in parallel to the preliminary reading word line and includes a conductive material being bent in response to an applied voltage; forming a preliminary writing word line over the preliminary electrode, wherein the preliminary writing word line corresponds to the preliminary electrode and the preliminary reading word line, and is separated from the preliminary contact tip; and etching central portions of the preliminary writing word line, the preliminary contact tip, the preliminary electrode and the preliminary reading word line to form a writing word line, a contact tip, an electrode and a reading word line.