Patent ID: 6118141
Filing Date: 2000-09-12
Classification: H01L

Abstract:
An emitter-switched thyristor havinga main thyristor (TH), which is formed from a p+ anode emitter (1), a drift zone (3') having an opposing conduction type, a zone (4) which, in the turned-off state of the thyristor, has a blocking zone with respect to the drift zone (3'), and a cathode-side emitter (5) having, again, a reversed conduction type, resulting in a zone sequence p+n-pn+;a transistor structure (T), which is parallel to the main thyristor and comprises three regions of alternating conductivity: an emitter (1), which is identical to the p+ anode emitter (1), an n-doped zone (3) as a base, a collector region (8); andan NMOSFET (M1) for direct actuation of the cathode-side emitter (5), with the source of this transistor, like the collector region (8), being contacted by a cathode (K), which is connected to a cathode connector;a turn-on DMOSFET (M2), whose gate (G2) is connected to a gate (G1) of the NMOSFET (M1); a source (S2), which is likewise contacted by the cathode (K), and is embedded in a p base that is identical to the collector region (8); a drain region (D2), which is embedded in the n-doped zone (3), with the channel region of the DMOSFET being disposed in the collector region (8); anda PMOSFET (M3), whose gate is connected to the cathode and whose drain (D3) is a part of the collector region (8), whose source region is connected to the zone (4) of the main thyristor (TH) and whose channel region is formed by a part of the n-doped zone (3) that borders on the component surface.