 SONOS has been in the past produced by Philips Semiconductors, Spansion, Qimonda and Saifun Semiconductors.In 2002, AMD and Fujitsu, formed as Spansion in 2003 and later merged with Cypress Semiconductor in 2014, developed a SONOS-like "MirrorBit" technology based on the license from Saifun Semiconductors, Ltd.'s "NROM technology".As of 2011 Cypress Semiconductor developed SONOS memories for multiple processes,
and started to sell them as IP to embed in other devices.