Patent ID: 6851384

Claim:
A remote plasma apparatus comprising: a body defining a cavity and having first and second inlets, the cavity comprising a plasma generation region and a processing region, the first inlet communicating with the plasma generation region to introduce a first gas into the plasma generation region, the second inlet communicating with the processing region to supply a second gas into the processing region; an energy source arranged and adapted to apply energy within the plasma generation region to generate, from the first gas, plasma including radicals; a plate arranged in the cavity and dividing the cavity between the plasma generation region and the processing region, the plate being formed with a plurality of perforated holes which the radicals pass through and each of which has a diameter not larger than three millimeters, wherein aperture ratio of the perforated holes area to the plate area is not greater than five percent, so as to avoid diffusion of the second gas from the processing region to the plasma generation region and as a result, to suppress backward flow of said second gas into said plasma generation region; and a substrate supporter arranged within the processing region and adapted to support a substrate to be processed by using a reaction between the radicals passing through the perforated holes and the second gas supplied through the second inlet.