Thermomigration of Gold-Rich Droplets in Silicon

Abstract
The thermomigration of gold‐rich liquid droplets through solid silicon in a constant thermal gradient of 50°C/cm was studied as a function of temperature. A simple equation based on diffusion control adequately described the variation of the droplet velocity with temperature. The effective diffusion coefficient D* of Si through the Au–Si liquid was found to follow the relation D*=D0 exp(−Q/RT), where Q=5.0 kcal/mole and D0=2.5×10−3 cm2/sec.