Toshihiko Kasai

Multiple Programming Method and Circuitry for a Phase Change Nonvolatile Random Access Memory (PRAM)

Kazuya Nakayama, Akio Kitagawa, Masashi Takata, 2004 .

Pulse number control of electrical resistance for multi-level storage based on phase change

Junichi Akita, Akio Kitagawa, Masaki Takata, 2007 .

Nonvolatile Memory Based on Phase Change in Se–Sb–Te Glass

Minoru Kumeda, Akio Kitagawa, Toshihiko Kasai, 2003 .