Patent ID: 9580808
Date: 2017-02-28
CPC Classifications: C03B,C23C,H01J

Claim:
1. An apparatus for performing a plasma chemical vapor deposition process, comprising: a mainly cylindrical resonator being provided with an outer cylindrical wall and an inner cylindrical wall, enclosing an annular resonant cavity in a radial direction, the resonator extending in a circumferential direction around a cylindrical axis, the resonator further being provided with side wall portions bounding the resonant cavity in the cylindrical direction, and the inner cylindrical wall provided with a slit configuration extending in a circumferential direction around the cylindrical axis providing access from the resonant cavity radially inwardly, wherein the slit configuration includes slit sections that are mutually offset in the cylindrical direction, and wherein the slit sections are also staggered in the circumferential direction linking up in the circumferential direction as a closed ring, and wherein a substrate tube is received in a tubular inner space, radially inwardly from the resonant cavity, and wherein the substrate tube is arranged to rotate, during operation of the apparatus, with respect to the cylindrical axis of the resonator.