Stmicroelectronics (rousset) Sas

Romeric Gay

Abderrezak Marzaki

A bipolar transistor includes a common collector region comprising a buried semiconductor layer and an annular well. A well region is surrounded by the annular well and delimited by the buried semiconductor layer. A first base region and a second base region are formed by the well region and separated from each other by a vertical gate structure. A first emitter region is implanted in the first base region, and a second emitter region is implanted in the second base region. A conductor track electrically couples the first emitter region and the second base region to configure the bipolar transistor as a Darlington-type device. Structures of the bipolar transistor may be fabricated in a co-integration with a non-volatile memory cell.

Integrated circuit comprising at least one bipolar transistor and a corresponding method of production

A triple-gate MOS transistor is manufactured in a semiconductor substrate including at least one active region laterally surrounded by electrically isolating regions. Trenches are etched on either side of an area of the active region configured to form a channel for the transistor. An electrically isolating layer is deposited on an internal surface of each of the trenches. Each of the trenches is then filled with a semiconductive or electrically conductive material up to an upper surface of the active region so as to form respective vertical gates on opposite sides of the channel. An electrically isolating layer is then deposited on the upper surface of the area of the active region at the channel of the transistor. At least one semiconductive or electrically conductive material then deposited on the electrically isolating layer formed at the upper surface of the active region to form a horizontal gate of the transistor.

Triple-gate MOS transistor and method for manufacturing such a transistor

A device includes a MOS transistor and a bipolar transistor at a same first portion of a substrate. The first portion includes a first well doped with a first type forming the channel of the MOS transistor and two first regions doped with a second type opposite to the first type that are arranged in the first well which form the source and drain of the MOS transistor. The first portion further includes: a second well doped with the second type that is arranged laterally with respect to the first well to form the base of the bipolar transistor; a second region doped with the first type that is arranged in the second well to form the emitter of the bipolar transistor; and a third region doped with the first type that is arranged under the second well to form the collector of the bipolar transistor.

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Aix-en-Provence, France

Romeric Gay