Spin Transfer Technologies (STT) has successfully produced a working prototype STT-MRAM device. The company's advanced prototyping magnetics processing line at its facility in Fremont, California, is now fully operational.
STT's prototypes incorporate proprietary, performance-enhancing ‘spin-filtering’ technology, and were fabricated on industry standard CMOS wafers sourced from a high volume Asian foundry supplier. The prototypes are based on 60-nm perpendicular magnetic tunnel junction devices
In 2015 STT raised $70 million (in addition to $36 million raised in 2012). Back in October 2008 we have interviewed Vincent Chun, who was then the executive in charge at STT.