IBM Shows 155GHz Graphene Transistor

IBM has reached a new milestone in its research of graphene transistors. We learned over a year ago that IBM had achieved a radio-frequency graphene transistor with the cut-off frequency of 100 GHz. Now IBM has cranked it up even higher – hitting 155 GHz.

Graphene is a single atom-thick layer of carbon atoms bonded in a hexagonal honeycomb-like arrangement. This two-dimensional form of carbon has unique electrical, optical, mechanical and thermal properties and its technological applications are being explored intensely by IBM.

While the 155 GHz number is mighty impressive, it's not really the sort of transistor that's going to be immediately of interest to those looking for the next big personal computing technology.

IBM's work on the graphene transistor is part of the DARPA program to develop high performance radio transistors. Graphene is better suited to analog signals, as it does not have the discrete on/off characteristics of silicon.

Read more from Computerworld.

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  • WyomingKnott
    ... as it does not have the discrete on/off characteristics of silicon.

    Someone enlighten me here. I thought that transistors were originally analog devices for many years. They had to be re-designed to be on-off devices. Am I wrong?
  • galland
    You're right, today's transistors are like a faucet that is used only at full close or full open but still have many intermediate positions
  • dogman_1234
    I thought the transistor was suppose to be an on/off switch? I congratulate the engineers at IBM, yet the transistor itself is not all that complete.