Patent ID: 6487986
Filing Date: 2002-12-03
Classification: C23C

Abstract:
An apparatus for depositing polycrystalline diamond onto a flat substrate, comprisinga process chamber; an airlock for the entry and exit of the substrates; a system within the process chamber for passing the substrates through the process chamber; a plurality of microwave plasma generating sources each having a linear microwave radiation tube, said plurality of microwave plasma generating sources being arranged parallel to one another and in a common plane above the substrate and extending transversely across the direction of substrate movement; a plurality of gas inlet tubes, each gas inlet tube having an inlet opening that communicates with said process chamber, wherein said inlet openings are situated immediately above said corresponding microwave plasma sources and distributed over the length of the linear microwave radiation tube; a plurality of gas outlet tubes, each gas outlet tube having an outlet opening that communicates with said process chamber, each of said gas outlet tubes being associated with a microwave plasma generating source and positioned in an area between adjacent microwave plasma generating sources and in a plane which extends approximately through the core axes of said microwave plasma generating sources.