Patent ID: 8091506

Claim:
A reactor system for deposition of diamond films from a gaseous phase in a plasma of a microwave discharge, which system contains a microwave generator, a transmission line ending with a quasi-optical electrodynamic system, a reaction chamber with a substrate on a substrate holder placed in the chamber, and a system for pump-in and pump-out of the selected gaseous mixture, the improvement which comprises a quasi-optical electrodynamic system with two concave minors focused together towards the plasma and adapted to form a standing microwave from two Gaussian beams in an area near the surface of the substrate, with plasma generated in antinodes of the standing wave, and the transmission line is a circular waveguide, with corrugation of its internal surface, adapted to transfer one Gaussian beam from the microwave generator, which is supplemented with an oversized rectangular waveguide adapted to divide the one Gaussian wave beam into two Gaussian wave beams, and a minor system to transfer said two Gaussian beams to the concave mirrors of the quasi-optical electrodynamic system, so that said two Gaussian beams are focused towards the plasma.