Macronix Assigned Patent

Macronix International Co., Ltd., Hsinchu, TW, has been assigned a patent (8,912,515), developed by Lung Hsiang-Lan, Dobbs Ferry, NY, for a “manufacturing method for pipe-shaped electrode phase change memory.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A method for manufacturing a memory cell device includes forming a bottom electrode comprising a pipe-shaped member, a top, a bottom and sidewalls having thickness in a dimension orthogonal to the axis of the pipe-shaped member, and having a ring-shaped top surface. A disc shaped member is formed on the bottom of the pipe-shaped member having a thickness in a dimension coaxial with the pipe-shaped member that is not dependent on the thickness of the sidewalls of the pipe-shaped member. A layer of phase change material is deposited in contact with the top surface of the pipe-shaped member. A top electrode in contact with the layer of programmable resistive material. An integrated circuit including an array of such memory cells is described.“

The patent application was filed on March 10, 2011 (13/045,376)