Patent ID: 7679024

Claim:
A gas distribution arrangement configured to provide a process gas downstream to a plasma tube of a plasma processing chamber for forming plasma inside said plasma tube such that said plasma tube contains said plasma, said plasma tube having a top end, said gas distribution arrangement comprising: a body having a first element and a protrusion element, said first element being wider than said plasma tube, said first element being configured to be coupled with said plasma tube, said first element including a gas inlet for receiving said process gas, said first element further including a plurality of side channels, said protrusion element being adapted to be inserted into said top end; a plurality of continuous channels extending from a side surface of said protrusion element to a bottom of said protrusion element, said side surface of said protrusion element facing an inner surface of said plasma tube and being parallel to said inner surface of said plasma tube, said inner surface of said plasma tube surrounding said protrusion element; and an area disposed between said side surface of said protrusion element and said inner surface of said plasma tube, said plurality of side channels being configured to direct said process gas from said gas inlet to said area, said plurality of continuous channels being configured to direct said process gas from said area into said plasma tube.