Spin-on dopants as lifetime modifier sources in fast recovery epitaxial diodes processing

The paper presents the results of an experimental study dedicated to lifetime control in fast recovery epitaxial diodes (FRED) by gold and platinum diffusion from spin-on sources. The main diode parameters, namely reverse recovery time, forward voltage drop and leakage current (especially at high temperatures) are comparatively analyzed. It is shown that platinum and gold offer a different trade-off between these parameters. The final choice of the lifetime modifier is determined by the intended diodes applications.