| 摘要 |
A phase-change-material memory cell is provided. The cell comprises at least one patterned layer of a phase-change material, and is characterized in that this patterned layer comprises at least two regions having different resistivities. If the resistivity of the phase-change material is higher in a well-defined area with limited dimensions ("hot spot") than outside this area, then, for a given current flow between the electrodes, advantageously more Joule heat will be generated within this area compared to the area of the phase-change material where the resistivity is lower.
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