SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME

摘要

The invention relates to a semiconductor device (10) with a substrate (11) and a semiconductor body (12) comprising a vertical bipolar transistor with an emitter region, a base region and a collector region (1, 2, 3) of, respectively, a first conductivity type, a second conductivity type opposite to the first conductivity type and the first conductivity type, wherein the collector region (3) comprises a first sub-region (3A) bordering the base region (2) and a second sub-region (3B) bordering the first sub-region (3A) which has a lower doping concentration than the second sub-region (3B), and the transistor is provided with a gate electrode (5) which laterally borders the first sub-region (3A) and by means of which the first sub-region (3A) may be depleted. According to the invention the collector region (3) borders the surface of the semiconductor body (12), while the emitter region (1) is recessed in the semiconductor body (12), and the collector region (3) forms part of a mesa structure (6) formed at the surface of the semiconductor body (12). Such a device (10) has very favorable properties at high frequencies and high voltages and, moreover, is easy to manufacture. In a preferred embodiment the collector (3) comprises a nanowire (30) forming the mesa structure (6).