Comparative logic figure of merit of current high-speed transistors

A logic figure of merit is used for the comparative measure of speed of three transistors that represent current technology applied to high-speed transistors. An indium phosphide Schottky-barrier field-effect transistor with a channel length of 1 /spl mu/m has T/SUB FM/=69.2 ps. A gallium arsenide field-effect transistor of essentially the same geometry has T/SUB FM/=80.7 ps. A silicon bipolar transistor with an active base-width of 0.08 /spl mu/m and 5/spl times/0.4 emitter stripes has T/SUB FM/=113.8 ps with package included and T/SUB FM/=65.2 ps for chip only.