摘要:
A method is provided for processing a workpiece in a plasma reactor chamber having electrodes including at least a ceiling electrode and a workpiece support electrode. The method includes coupling respective RF power sources of respective VHF frequencies f1 and f2 to either (a) respective ones of the electrodes or (b) a common one of the electrodes, where f1 is sufficiently high to produce a center-high non-uniform plasma ion distribution and f2 is sufficiently low to produce a center-low non-uniform plasma ion distribution. The method further includes adjusting a ratio of an RF parameter at the f1 frequency to the RF parameter at the f2 frequency so as to control plasma ion density distribution, the RF parameter being any one of RF power, RF voltage or RF current.
摘要:
A reactor is provided for removing polymer from a backside of a workpiece. The reactor includes a vacuum chamber having a ceiling, a floor and a cylindrical side wall. The reactor further includes workpiece support apparatus within the chamber configured for a workpiece to be placed thereon with its front side facing the ceiling. The support apparatus is configured to leave at least an annular periphery of the backside of the workpiece exposed. A confinement member defines a narrow gap with an outer edge of the workpiece, the narrow gap being on the order of about 1% of the workpiece diameter, the narrow gap corresponding to a boundary dividing the chamber between an upper process zone and a lower process zone, the reactor further comprising a vacuum pump coupled to the lower process zone. An external plasma-generating chamber is coupled to the chamber, the external plasma-generating chamber configured to introduce a plasma by-product into the lower process zone, and a supply of a polymer etch precursor gas to the external plasma-generating chamber. The ceiling includes a gas distribution plate facing the upper process zone, the reactor further comprising a purge gas supply coupled to the gas distribution plate.
摘要:
A plasma reactor includes a ceiling electrode facing a workpiece support pedestal and a pedestal electrode in the pedestal and first and second VHF power sources of different frequencies coupled to the same or to different ones of the ceiling electrode and the pedestal electrode. The first and second VHF power sources are of sufficiently high and sufficiently low frequencies, respectively, to produce center-high and center-low plasma distribution non-uniformities, respectively, in the chamber. The reactor further includes a controller programmed to change the relative output power levels of the first and second VHF power sources to: (a) increase the relative output power level of the first VHF power source whenever plasma ion distribution has a predominantly edge-high non-uniformity, and (b) increase the relative output power level of the second VHF power source whenever plasma ion distribution has a predominantly center-high non-uniformity.
摘要:
Embodiments of the present invention provide a substrate support assembly having a protective layer that enhances plasma resistance. In one embodiment, a substrate support assembly includes an electrostatic chuck having an upper substrate support surface, and a protective layer disposed on the electrostatic chuck, wherein the protective layer is fabricated by a ceramic material containing a rare earth metal.
摘要:
Electrostatic chucks (ESCs) with RF and temperature uniformity are described. For example, an ESC includes a top dielectric layer. An upper metal portion is disposed below the top dielectric layer. A second dielectric layer is disposed above a plurality of pixilated resistive heaters and surrounded in part by the upper metal portion. A third dielectric layer is disposed below the second dielectric layer, with a boundary between the third dielectric layer and the second dielectric layer. A plurality of vias is disposed in the third dielectric layer. A bus power bar distribution layer is disposed below and coupled to the plurality of vias. A fourth dielectric layer is disposed below the bus bar power distribution layer, with a boundary between the fourth dielectric layer and the third dielectric layer. A metal base is disposed below the fourth dielectric layer. The metal base includes a plurality of high power heater elements housed therein.
摘要:
Electrostatic chucks (ESCs) with RF and temperature uniformity are described. For example, an ESC includes a top dielectric layer. An upper metal portion is disposed below the top dielectric layer. A second dielectric layer is disposed above a plurality of pixilated resistive heaters and surrounded in part by the upper metal portion. A third dielectric layer is disposed below the second dielectric layer, with a boundary between the third dielectric layer and the second dielectric layer. A plurality of vias is disposed in the third dielectric layer. A bus power bar distribution layer is disposed below and coupled to the plurality of vias. A fourth dielectric layer is disposed below the bus bar power distribution layer, with a boundary between the fourth dielectric layer and the third dielectric layer. A metal base is disposed below the fourth dielectric layer. The metal base includes a plurality of high power heater elements housed therein.
摘要:
Methods and apparatus for reducing particles in a gas delivery system are provided herein. In some embodiments, a method of fabricating a gas distribution apparatus, such as a gas distribution plate or nozzle, for a semiconductor process chamber includes providing a gas distribution apparatus having one or more apertures adapted to flow a gas therethrough. A slurry is flowed through the one or more apertures to remove a damaged surface from sidewalls of the plurality of apertures. In some embodiments, the gas distribution apparatus may be oxidized before or after flowing the slurry through the one or more apertures. In some embodiments, the gas distribution apparatus may be conditioned by providing RF power to the gas distribution plate for a desired period of time.
摘要:
A method for processing a workpiece in a plasma reactor chamber includes coupling RF power at a first VHF frequency f1 to a plasma via one of the electrodes of the chamber, and providing a center ground return path for RF current passing directly between the ceiling electrode and the workpiece support electrode for the frequency f1. The method further includes providing a variable height edge ground annular element and providing a ground return path through the edge ground annular element for the frequency f1. The method controls the uniformity of plasma ion density distribution by controlling the distance between the variable height edge ground annular element and one of: (a) height of ceiling electrode or (b) height of workpiece support electrode.
摘要:
A reactor is provided for removing polymer from a backside of a workpiece. The reactor includes a vacuum chamber having a ceiling, a floor and a cylindrical side wall. A workpiece support apparatus within the chamber is configured to support a workpiece thereon, so that the workpiece has its front side facing the ceiling. The support apparatus leaves at least an annular periphery of the backside of the workpiece exposed. A confinement member defines a narrow gap with the outer edge of the workpiece, the narrow gap being on the order of about 1% of workpiece diameter, the narrow gap corresponding to a boundary dividing the chamber between an upper process zone and a lower process zone. A vacuum pump is coupled to the lower process zone. A lower external plasma-generating chamber introduces a plasma by-product into the lower process zone and a supply of a polymer etch precursor gas coupled to the lower external plasma-generating chamber. An upper external plasma-generating chamber is coupled to introduce a plasma by-product into the upper process zone and a supply of a scavenger species precursor gas coupled to the upper external plasma-generating chamber.
摘要:
Embodiments of the present invention provide chamber components having a protective element for shielding bonding material from processing environments in a processing environment. The protective element may include protective seals, protective structures, erosion resistive fillers, or combinations thereof. Embodiments of the present invention reduce erosion of bonding material used in a processing chamber, thus, improving processing quality and reducing maintenance costs.