The Corrugated P-Base IGCT - a New Benchmark for Large Area SQA Scaling

A 91 mm diameter IGCT with extraordinary safe operating area (SOA) is presented in this paper. The power density at turn-off reached values as high as 700 W/cm ² , which is twice the previously reported SOA limit for devices with a comparable diameter. The improvement was achieved by masking one of the p-base diffusions, giving the p-base a corrugated appearance as well as improving the gate circuit.