Embedded STT-MRAM: Device and design

Abstract Spin-transfer-torque magnetoresistive random access memory (STTMRAM) is made of a combination of semiconductor integrated circuits (IC) and a dense array of nanometer-scale magnetic tunnel junctions (MTJ). This emerging memory is of growing technological interest due to its potential to bring disruptivedevice innovation to the world of electronics. STT-MRAM is capable of providing high speed, unlimited endurance, and nonvolatility simultaneously, which is often recognized as a unique advantage over conventional and other emerging memories. While the technology is at an early stage and evolving in multiple platforms, STTMRAM is particularly compelling as an embedded memory for system-on-chip (SOC). STT-MRAM can be integrated into SOC without altering baseline logic platforms both in process and in design. This chapter overviews key device and circuit subjects from the perspective of co-designing logic and MTJ.