Abstract:
The invention concerns a method of forming a field effect transistor comprising a gate (G) formed on an insulating layer, the gate having, in a zone in contact with the insulating layer, a semiconducting central zone (50) and lateral zones (48) in the length of the gate (G), the method comprising forming a gate (G) comprising a portion of insulating layer (32), a portion of semiconducting layer formed over the insulating layer (32), and a portion of mask layer formed over the semiconducting layer; performing an etching of the portion of the mask layer such that only a portion in the centre of the gate (G) remains; and reacting the semiconducting gate with a metal deposited over the gate.
Abstract:
A process for forming a wire portion in an integrated electronic circuit includes epitaxially growing the wire portion on a side surface of a seed layer portion (11, 12). Cross-sectional dimensions of the wire portion correspond to a thickness of the seed layer portion and to a duration of the growing step. The seed layer portion is then selectively removed while the wire portion is retained fixedly on the circuit. Afterwards, heating of the circuit can cause the wire portion becoming rounded in cross-section. The wire portion obtained may be about 10 nanometers in diameter. It may be used for forming a channel of a MOS transistor devoid of short channel effect.