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Researchers in Japan have found a magic ingredient that speeds transistors:
air. Charge build-up around a transistor鈥檚 silicon 鈥渃hannel鈥濃�攊ts main
electronic artery鈥攈inders current flow. Electrically insulating this
channel with a solid insulator lowers the resistance but can lead to overheating
that fries the transistor. But now Toshiba has managed to suspend a transistor
channel above an air-filled trench that electrically insulates it. This speeds
up the transistor and lets heat escape into the air. Toshiba鈥檚
鈥渟ilicon-on-nothing鈥� transistor will be unveiled at the Electron Devices
conference in Washington DC next week.