摘要:
A plasma (56, 333) generating apparatus (10, 320, 450) wherein a stage (250, 300, 300A, 350, 400, 425) is constructed to keep the plasma on the substrate (S). A pair of electrically, non-conductive tubes (252, 252A, 303, 305, 303A, 305A 403, 405) are mounted on a conductive base plate (253,306,406) having holes (255, 306B) for gas flow and one of the tubes supports a conductive support plate (251, 301, 351, 401) for a substrate (S). An electrically conductive disk (304, 404) between the tubes is provided. An outer conductive tube (307, 418) is preferably used with larger diameter chambers. The stage is designed to prevent the plasma from falling below conductive support plate which preferably mounts a graphite insert (302, 352, 402) which supports the substrate.
摘要:
A method for ablating a synthetic diamond having a pitted surface includes applying a colloidal graphite to the surface of the diamond and subjecting it to an oxygen plasma so that preferably approximately 50 microns are removed from the surface of the synthetic diamond. The resulting surface of the diamond is virtually pit free. Preferably, the diamond is then mechanically lapped for finishing.