Patent ID: 6645343
Filing Date: 2003-11-11
Classification: H01J

Abstract:
A plasma reactor comprising:a reactor housing (2) designed as a resonator in which a substrate holder (3) for a substrate to be coated is located, the reactor housing (2) including connections (10, 11) for supplying and removing a process gas, and having a ring-shaped, vacuum-tight window (12) of microwave-permeable material with a ring surface that extends about a circumference of the reactor housing; a high-frequency coaxial line (5) arranged coaxially with a longitudinal axis of the housing and being connected with a high-frequency generator (6) for irradiation of microwaves and having a delivery end at a transition area from the high-frequency coaxial line to the housing that is directed at the microwave-permeable window; the high-frequency coaxial line (5) is funnel-shaped as it extends through the transition area to the delivery end outside the reactor housing (2) and is essentially rotationally symmetric and is directed at a periphery of the reactor housing (2) toward the microwave window (12) for a coupling that is symmetrically distributed over the entire ring surface of the microwave window.