The n-channel high-frequency dual-gate MOSFET's or tetrodes made using Mo gate (RMOS) self-aligned processing are described. This includes design and processing considerations, manufacturing yield, and high-frequency performance. Each of the two gates are protected with p-n diode structures which exhibit silicon-controlled rectifier action, UHF data on devices built on epitaxial wafers show high-gain narrow-bandwidth characteristics.
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Brown et al. (1978) studied this question.
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