IMPROVED COAXIAL CAVITY TYPE, RADIOFREQUENCY WAVE, PLASMA GENERATING APPARATUS

摘要

A coaxial radiofrequency wave plasma generating apparatus with an elongate metallic cavity (10) having a movable elongate coupling probe (16) mounted in line with an axis (a-a) of the cavity having a central coaxial conductor (11) and having a movable plate (12) for obtaining a mode of resonance of the radiofrequency wave in the cavity surrounding a chamber (14) for confining the plasma (100) is described. An end (11b) of the conductor is adjacent to the chamber and can optionally support a set of magnets (27). The apparatus is particularly useful for retrofitting existing vacuum sources (101) having small inlet ports (105) for plasma treatment using molecular beam epitaxy (MBE).