SiGe (or ), or silicon-germanium,'s a general term for the alloy Si1-xGex which consists of any molar ratio of silicon and germanium. It's commonly used as a semiconductor material in integrated circuits (ICs) for heterojunction bipolar transistors or as a strain-inducing layer for CMOS transistors. This relatively new technology offers opportunities in mixed-signal circuit and analog circuit IC design and manufacture. Production The use of silicon-germanium as a semiconductor was championed b… (More on Silicon-germanium)