Activation treatment of ion implanted dopants using hybrid super RTA equipment

We perform rapid thermal annealing (RTA) on areas as large as 2-inch φ (diameter) at high temperature using the hybrid super RTA (HS-RTA) equipment. The HS-RTA equipment consists of an infrared annealing unit and a RF induction annealing unit in order to uniformly anneal over 2-inch φ susceptor. As a result of annealing by the HS-RTA equipment, the temperature is elevated from RT to peak temperature (∼1800°C) for less than 1 min, remain stable at annealing temperature for 30s and falls from peak temperature to 1000°C within less than 20s. The temperature distributions on a 2-inch φ susceptor are ±10°C, ±33°C and ±55°C at 1565°C, 1671°C and 1752°C, respectively. Phosphorus (P) ion implanted silicon carbide (SiC) samples are used to evaluate the performance of the HS-RTA equipment. The five implanted samples placed on the 2-inch φ susceptor are annealed for 30s at 1565°C, 1671°C and 1752°C. The mean sheet resistances of the 5 samples annealed at 1565°C, 1671°C and 1752°C are 92.6Ω/□, 82.6Ω/□ and 75.50/□, respectively. The sheet resistance uniformities are 9.9%, 7.9% and 9.3%. The average roughness (R_a) is calculated from 10 μm square Atomic Force Microscopy (AFM) image. R_a values of the samples annealed at 1565°C, 1671°C and 1752°C are 2.399 nm, 2.408 nm and 3.282 nm, respectively.