Silicon Germanium (SiGe)

Silicon germanium (SiGe) is a semiconductor alloy combining 70% silicon and 30% germanium, engineered to bridge the bandgap and lattice properties of its constituent elements. This material is widely used in high-frequency analog and mixed-signal integrated circuits, particularly in RF amplifiers, satellite communications, and automotive radar systems, where it offers superior speed and noise performance compared to pure silicon while maintaining better integration compatibility than germanium alone. SiGe's strained-layer engineering enables higher charge carrier mobility than bulk silicon, making it the preferred choice for noise-critical applications and millimeter-wave circuits where cost-effectiveness and established silicon fabrication processes provide significant manufacturing advantages.