Opposed gate-source transistor

Metal working – Method of mechanical manufacture – Assembling or joining

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Details

29576B, 29576E, 29578, 29580, 29591, 148 15, 357 22, H01L 2980

Patent

active

045519048

ABSTRACT:
A field-effect transistor (FET) and a corresponding method for its fabrication, the transistor having a source and a gate located at opposite faces of an active channel region formed in a substrate, the source being substantially shorter in effective length than the gate and located symmetrically with respect to the gate. The transistor also has two drains, located one at each end of the channel region, and charge carriers flow from the source to the drains in two paths, under control of the same gate. Electrical contact with the source is made from beneath the substrate, while contact with the gate and drains is made from above. The resulting device has a large incremental transconductance and relatively small parasitic impedances, and therefore can operate at much higher frequencies than conventional FET's.

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