Bidirectional field-effect transistor and matrix converter

H - Electricity – 01 – L

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Details

H01L 21/337 (2006.01) H01L 29/808 (2006.01)

Patent

CA 2590147

A bidirectional field-effect transistor capable of controlling currents flowing in both directions by a single device and a matrix converter employing it. The bidirectional field-effect transistor comprises a semiconductor substrate (1), a gate region provided on the semiconductor substrate (1) and including a channel parallel with a major surface of the substrate (1) and a gate electrode (13a) for controlling the conductance of the channel, a first region provided on a first end side of the channel, and a second region provided on the second end side of the channel. A forward current flowing from the first electrode (11a) in the first region through the channel to the second electrode (12a) in the second region, and a reverse current flowing from the second electrode (12a) through the channel to the first electrode (11a) are controlled by a gate voltage applied to the gate electrode (13a).

L'invention concerne un transistor à effet de champ bidirectionnel pouvant commander les courants circulant dans les deux sens grâce à un seul composant et un convertisseur matriciel l'utilisant. Le transistor à effet de champ bidirectionnel comprend un substrat semi-conducteur (1) une région de grille prévue sur le substrat semi-conducteur (1) et incluant un canal parallèle à une surface principale sur le substrat (1) ainsi qu'une électrode de grille (13a) destinée à commander la conductance du canal, une première région étant prévue sur une première extrémité du canal et une seconde région étant prévue sur la seconde extrémité du canal. Un courant direct circulant depuis la première électrode (11a) dans la première région au travers du canal vers la seconde électrode (12a) dans la seconde région et un courant inverse circulant depuis la seconde électrode (12a) au travers du canal vers la première électrode (11a) sont commandés par une tension de grille appliquée sur l'électrode de grille (13a).

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