Patent ID: 7368802
Filing Date: 2008-05-06
Classification: H01L

Abstract:
1. A phase-change memory device comprising: a phase-change layer; a heater electrode having an end held in contact with said phase-change layer; a contact plug of different kinds of material having a first electrically conductive material plug made of a first electrically conductive material and held in contact with the other end of said heater electrode, and a second electrically conductive material plug made of a second electrically conductive material having a specific resistance smaller than said first electrically conductive material, said first electrically conductive material plug and said second electrically conductive material plug being held in contact with each other through at least respective side surfaces thereof, said heater electrode and said second electrically conductive material plug being not in overlapping relation to each other; and an electrically conductive layer electrically connected to said second electrically conductive material plug.