Patent ID: 8659938
Filing Date: 2014-02-25
Classification: G11C

Abstract:
1. A magnetic random access memory (MRAM) cell comprising: a magnetic tunnel junction comprising a tunnel barrier layer between a first magnetic layer having a first magnetization direction, and a second magnetic layer having a second magnetization direction being adjustable from a first direction to a second direction relative to the first magnetization direction, such as to vary a junction resistance of the magnetic tunnel junction from a first to a second junction resistance level; said magnetic tunnel junction further comprising a switching resistant element electrically connected to the magnetic tunnel junction and having a switching resistance that can be switched from a first to a second switching resistance level when a switching current is passed through the switching resistant element, such that a MRAM cell resistance of the MRAM cell can have at least four different cell resistance levels depending of the resistance level of the junction resistance and of the switching resistance.