A single-mask structure for a micrometer-sized silicon triode (microtriode)
is proposed. The fabrication of the device has been optimized to produce a
suspended chromium gate above a pyramidal silicon cathode. The gate approa
ches from the side, in the same plane as the anode. Field emission between
the anode and cathode in diode-mode operation in atmosphere has been confir
med. Diode-mode operation of the device is suitable for sensor applications
. (C) 1999 American Vacuum Society. [S0734-211X(99)04902-1].