Patent ID: 8928116
Filing Date: 2015-01-06
Classification: H01L

Abstract:
1. A semiconductor structure comprising at least one bipolar junction transistor (BJT) power device, the semiconductor structure comprising: an insulating layer formed on the substrate; an active region formed on at least a portion of the insulating layer; a collector extension region having a first conductivity type formed in the active region proximate an upper surface of the active region; a collector region having the first conductivity type formed in at least a portion of the collector extension region proximate an upper surface of the collector extension region, the collector region having a higher doping concentration compared to the collector extension region; a collector terminal formed on an upper surface of the semiconductor structure and electrically connecting with the collector region; a buried well having a second conductivity type formed in the active region, the buried well being configured, in conjunction with the active region, to form a clamping diode operative to position a breakdown avalanche region between the buried well and the collector terminal, a breakdown voltage of the bipolar junction transistor being a function of one or more characteristics of the buried well; a base region having the second conductivity type formed in the active region on at least a portion of the buried well and extending laterally to the collector extension region; an emitter region having the first conductivity type formed in an upper surface of the base region; an emitter terminal formed on the upper surface of the semiconductor structure, the emitter terminal being electrically connected with the emitter region; and a base structure formed on the upper surface of the semiconductor structure above a junction between the base region and the collector extension region, the base structure being isolated from a top surface of the active region and electrically connected with the buried well and a base terminal.