Patent ID: 8635972

Claim:
A plasma excitation device, for use in depositing a film on a substrate from a plasma formed by distributed electron cyclotron resonance, comprising: a microwave antenna in the form of a tube having an end from which microwaves are emitted, a magnet disposed beyond the said antenna end and defining therewith an electron cyclotron resonance region in which a plasma can be generated, the magnet being disposed separate and spaced from said antenna end, and a gas entry element, provided by said tube in conjunction with a gas feeding line having its downstream portion, with an outlet, the downstream portion disposed within the peripheral wall of the tube, and which is arranged to introduce gas into said cyclotron resonance region, at the end of said microwave antenna that faces said magnet, wherein said outlet for a film precursor gas or a plasma gas is arranged above and facing said magnet in order to direct gas past said magnet, towards a film deposition area situated beyond said magnet, as considered from said microwave antenna, and wherein said outlet being disposed separate and spaced apart from said magnet.