Patent ID: 8647434
Filing Date: 2014-02-11
Classification: C30B,H01L,Y10T

Abstract:
1. A vacuum system for semiconductor epitaxy, the system comprising: a. a pressure-controlled deposition chamber that maintains pressure above 10^−3 mbar up to about 1 mbar during epitaxial deposition; b. a substrate holder within the deposition chamber whereby a substrate is removably attached; c. sources that vaporizes substances into vapor particles and discharge the same to the deposition chamber, such vapor particles including elemental metals, metal alloys and dopants; d. a gas supply system that supplies gases to the deposition chamber; and e. a plasma source that supplies a suitable plasma to the deposition chamber, the discharge of the sources being disposed with respect to the substrate holder so as to enable direct contact with the substrate; wherein the system is adapted to propagate gas and vapor particles diffusively in the deposition chamber, the gas and particles being activated by the plasma, so as to react and form a uniform epitaxial layer on a heated substrate fixed to the substrate holder by low-energy plasma enhanced vapor phase epitaxy.