Patent ID: 8957400
Filing Date: 2015-02-17
Classification: G11C,H01L

Abstract:
1. A memory cell comprising: a first pattern made of a first phase-change material of a first conductivity type, the first pattern having a first thermal resistance value, a second pattern made of a second phase-change material of a second conductivity type, the second pattern having a second thermal resistance value, an electric p/n-type junction located between two electrodes, and formed at the interface between the first and second patterns, in an area where both patterns are polycrystalline, a heating element connected to the first pattern, the heating element being separated from the second pattern by the first pattern, the heating element having a third thermal resistance value, the ratio of the third thermal resistance to the sum of the first and second thermal resistances ranging between 0.9 and 1.1, a phase-change memory area formed in contact with the heating element in a portion of the first pattern.