Patent ID: 8008167
Filing Date: 2011-08-30
Classification: H01L

Abstract:
1. A method for manufacturing a phase change memory device, comprising the steps of: forming a plurality of bar type cell active regions and a bar type dummy active region that is located between adjoining sets of cell active regions, in a semiconductor substrate; forming a plurality of diodes in the cell active regions and the dummy active region; forming an insulation layer pattern on the resultant semiconductor substrate that is formed with the diodes, wherein the insulation layer pattern has holes, and wherein each of the insulation layer pattern having holes simultaneously exposes a portion between adjoining cell active regions and portions of the respective adjoining cell active regions adjacent to the portion, and covers the dummy active region; forming heaters in the holes in such a way as to contact the diodes in the cell active regions; forming a phase change layer on the heaters in the cell active regions and on the insulation layer pattern in the dummy active region; forming bit lines over the phase change layer; and forming word lines over the bit lines in the cell active regions and a global X-decoder line over the bit lines in the dummy active region.