Abstract:
An electrodeless lamp and process for emitting ultraviolet and/or vacuum ultraviolet radiation comprises an envelope formed of an ultra-pure and/or low-defect quartz material and an ultraviolet and/or vacuum ultraviolet emissive material disposed in the interior region of the envelope. The electrodeless lamp formed of the ultra-pure and/or low-defect quartz material minimizes degradation during use.
Abstract:
A remote plasma source employs a helical coil slow wave structure to couple microwave energy to a flowing gas to produce plasma for downstream substrate processing, such as photoresist stripping, ashing, or etching. The system also includes cooling structures for removing excess heat from the plasma source components.
Abstract:
A remote plasma generator (12), coupling microwave frequency energy to a gas and delivering radicals to a downstream process chamber (14), includes several features which, in conjunction, enable highly efficient radical generation. In the illustrated embodiments, more efficient delivery of oxygen and fluorine radicals translates to more rapid photoresist etch or ash rates. A single-crystal, one-piece sapphire applicator (40) and transport tube (41) minimizes recombination of radicals in route to the process chamber and includes a bend (42) to avoid direct line of sight from the glow discharge to the downstream process chamber (14). Microwave transparent cooling fluid within a cooling jacket (50) around the applicator (40) enables high power, high temperature plasma production. Additionally, dynamic impedance matching via a sliding short (60) at the terminus of the microwave cavity (28) reduces power loss through reflected energy. At the same time, a low profile microwave trap (44, 46) produces a more dense plasma to increase radical production. In one embodiment, fluorine and oxygen radicals are separately generated and mixed just upstream of the process chamber (14), enabling individually optimized radical generation of the two species.
Abstract:
An electrodeless lamp and process for emitting ultraviolet and/or vacuum ultraviolet radiation comprises an envelope formed of an ultra-pure and/or low-defect quartz material and an ultraviolet and/or vacuum ultraviolet emissive material disposed in the interior region of the envelope. The electrodeless lamp formed of the ultra-pure and/or low-defect quartz material minimizes degradation during use.