SEMICONDUCTOR DEVICE HAVING A SAFETY CIRCUIT

摘要

Safeguarded integrated circuit having two supply electrodes, an output electrode and an input electrode. Between two of the electrodes the circuit comprises a safety circuit having a lateral bipolar transistor the emitter and collector zones of which are connected to the said electrodes. The bipolar transistor is provided in a region which is surrounded by the substrate, serves as a base zone and has a conductivity type opposite to that of the substrate. A connection contact connected to the emitter is provided on said region and a modulatable resistance is formed between said connection contact and the active base zone by the said region. Application in particular to integrated MOS circuits.