Patent ID: 6663715
Filing Date: 2003-12-16
Classification: C23C,H01J

Abstract:
A plasma CVD apparatus comprising a plasma confining electrode for plasma separation provided between a plasma generation region and a substrate processing region to have a plurality of radical passage holes,wherein said plasma confining electrode is a hollow structure, neutral gas passage holes are provided for said plasma confining electrode on a side of said substrate processing region, a plurality of gas diffusion plates having neutral gas passage holes are provided in said plasma confining electrode, gas introduction pipes, which extend from a lateral direction of said plasma confining electrode to be coupled to side portions of said plasma confining electrode and are provided to supply gas such that a concentration distribution of a neutral gas between an upper plate of said plasma confining electrode and said gas diffusion plate on a side of said plasma generation region is higher in an outer region and lower in a center region, a total opening area of said neutral gas passage holes of said plurality of gas diffusion plates is higher on a side of said substrate processing region than that of said neutral gas passage holes on the side of said plasma generation region, and a distribution of the total opening area of said neutral gas passage holes for each of said plurality of gas diffusion plates is lower in said outer region and higher in said center region.