Phase change memory device
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United States of America Patent
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-
Feb 15, 2011
Grant Date -
Jul 24, 2008
app pub date -
Jan 9, 2008
filing date -
Jul 19, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A phase change memory device includes a mold layer disposed on a substrate, a heating electrode, a filling insulation pattern and a phase change material pattern. The heating electrode is disposed in an opening exposing the substrate through the mold layer. The heating electrode is formed in a substantially cylindrical shape, having its sidewalls conformally disposed on the lower inner walls of the opening. The filling insulation pattern fills an empty region surrounded by the sidewalls of the heating electrode. The phase change material pattern is disposed on the mold layer and downwardly extended to fill the empty part of the opening. The phase change material pattern contacts the top surfaces of the sidewalls of the heating electrode.
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