A Novel Program-verify Free and Low Drift Multilevel Operation on Cross-point OTS-PCM for In-Memory Computing Application

We present a novel multi-level operation using multi cells on a cross-point OTS-PCM array with no need for program-verify scheme for the first time. This method can provide not only program energy reduction but also low drift property. In addition, a true crossbar array structure is implemented that is ideal for in-memory computing application.