Patent ID: 6237528
Filing Date: 2001-05-29
Classification: C23C,H01J

Abstract:
A plasma reactor electrode assembly with optimized formation of a gas plate for processing semiconductor wafers comprising:a disk shaped gas plate, having a first side, a second side, and an outer peripheral edge;a plurality of gas passage holes distributed through said gas plate from the first side to the second side, formed using an ultrahigh velocity waterjet boring apparatus;a circular split collar assembly, including:a first semicircular section and a second semicircular section, the split collar assembly having a circular slot extending radially into an inner circumferential cylindrical wall thereof;means for mating the first semicircular section to the second semicircular section;said circular split collar assembly inner cylindrical slot having a first circular edge and a second circular edge above and below said slot;said gas plate outer peripheral edge having a circular peripheral groove, the grove defining a first rim proximate to the first side, and a second rim proximate to the second side; andsaid circular slot of said collar assembly slot being receptive of the first rim of said gas plate, the grove of said gas plate being receptive of the second edge of said collar assembly.