Patent ID: 8737121
Filing Date: 2014-05-27
Classification: G11C,H01L

Abstract:
1. A method of storing a bit at a memory device, comprising: configuring a memory cell comprising a germanium-deficient chalcogenide glass to alternate between an amorphous phase and a crystalline phase upon application of a selected voltage, wherein a resistivity drift coefficient of the germanium-deficient chalcogenide glass is less than a resistivity drift coefficient of an undoped chalcogenide glass, wherein the resistivity drift coefficient is related to a number of tetrahedral germanium coordinations in the amorphous phase of the chalcogenide glass and the memory cell is configured to have a fewer tetrahedral germanium coordinations in the amorphous phase than the undoped chalcogenide glass; and applying a voltage to the formed memory cell to select one of the amorphous phase and the crystalline phase to store the bit.