Patent ID: 9732440
Date: 2017-08-15
CPC Classifications: C23C,C30B,H01J,Y10T

Claim:
1. A microwave cavity plasma reactor (MCPR) for growing diamond, the reactor comprising: (a) a substrate holder for holding a growth substrate and growing diamond, the substrate holder comprising a bottom surface, a top surface opposing the bottom surface in a longitudinal axis direction defined by the substrate holder, a base surface between the top surface and bottom surface, and one or more sidewalls extending between the base surface and the top surface, wherein: (b) a reactor chamber enclosing the substrate holder, the reactor chamber being coupled to a microwave delivery means and a fluid inlet stream for generating a plasma in the reactor chamber; (c) a quartz dome enclosing the substrate holder, the quartz dome being positioned for facilitating formation of a plasma discharge over a substrate when the substrate is present in the substrate holder; (d) a recess extending means for extending the distance of the second recess above the first recess along the longitudinal axis thereby increasing the growth volume space as the substrate grows in thickness during diamond growth; wherein the reactor is operable to grow diamond on the substrate as a first thickness and a second thickness by contacting the substrate with the plasma in the growth volume space.