A 0.05?0.05mm2 RFID Chip with Easily Scaled-Down ID-Memory. - Mitsuo Usami; Hisao Tanabe; Akira Sato; Isao Sakama; Yukio Maki; Toshiaki Iwamatsu; Takashi Ipposhi; Yasuo Inoue (ISSCC, 2007)