Thermal processing of silicon wafers with microwave co-heating
Microwave heating of differently doped silicon substrates is performed in a 28 GHz applicator installed in a vacuum chamber with gas inlets. In the low temperature regime (<600C) silicon with low doping levels is faster heated than highly doped silicon. This is explained by the different skin depths of wave penetration. Co-heating by microwave radiation is suggested for low temperature processing with high uniformity and reproducibility. Thermal radiation behaves complementary in the low temperature regime with faster heating of highly doped silicon.
thermal processing silicon skin depth microwave absorption