Abstract:
Methods for processing substrates in twin chamber processing systems having first and second process chambers and shared processing resources are provided herein. In some embodiments, a method may include flowing a process gas from a shared gas panel to a processing volume of the first process chamber and to a processing volume of the second process chamber; forming a first plasma in the first processing volume to process the first substrate and a second plasma to process the second substrate; monitoring the first processing volume and the second processing volume to determine if a process endpoint is reached in either volume; and either terminating the first and second plasma simultaneously when a first endpoint is reached; or terminating the first plasma when a first endpoint is reached in the first processing volume while continuing to provide the second plasma in the second processing volume until a second endpoint is reached.
Abstract:
Fluctuations in a plasma characteristic such as load impedance are compensated by a controller that modulates a stabilization RF generator coupled to the plasma having a frequency suitable for stabilizing the plasma characteristic, the controller being responsive to the fluctuations in the plasma characteristic.
Abstract:
Embodiments of the present invention relate to plasma processing apparatus and methods of use thereof. In some embodiments, a plasma control magnet assembly includes a plurality of magnets arranged in a predetermined pattern that generate a magnetic field having a strength greater than 10 Gauss in a region proximate the assembly and less than 10 Gauss in a region remote from the assembly.
Abstract:
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.
Abstract:
A method, a system and a computer readable medium for integrated in-vacuo repair of low-k dielectric thin films damaged by etch and/or strip processing. A repair chamber is integrated onto a same platform as a plasma etch and/or strip chamber to repair a low-k dielectric thin film without breaking vacuum between the damage event and the repair event. UV radiation may be provided on the integrated etch/repair platform in any combination of before, after, or during the low-k repair treatment to increase efficacy of the repair treatment and/or stability of repair.
Abstract:
In a plasma reactor chamber a ceiling electrode and a workpiece support electrode, respective RF power sources of respective VHF frequencies f1 and f2 are coupled to either respective ones of the electrodes or to 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. Respective center ground return paths are provided for RF current passing directly between the ceiling electrode and the workpiece support electrode for the frequencies f1 and f2, and an edge ground return path is provided for each of the frequencies f1 and f2. The impedance of at least one of the ground return paths is adjusted so as to control the uniformity of the plasma ion density distribution.
Abstract:
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.
Abstract:
Methods and apparatus for controlling characteristics of a plasma, such as the spatial distribution of RF power and plasma uniformity, are provided herein. In some embodiments, an apparatus for controlling characteristics of a plasma includes a resonator for use in conjunction with a plasma reactor, the resonator including a source resonator for receiving an RF signal having a first frequency; a return path resonator disposed substantially coaxially with, and at least partially within, the source resonator; and an outer conductor having the source resonator and the return path resonator disposed substantially coaxially with, and at least partially within, the outer conductor, the outer conductor for providing an RF ground connection.
Abstract:
A solid solution-comprising ceramic article useful in semiconductor processing, which is resistant to erosion by halogen-containing plasmas. The solid solution-comprising ceramic article is formed from a combination of yttrium oxide and zirconium oxide. In a first embodiment, the ceramic article includes ceramic which is formed from yttrium oxide at a molar concentration ranging from about 90 mole % to about 70 mole %, and zirconium oxide at a molar concentration ranging from about 10 mole % to about 30 mole %. In a second embodiment, the ceramic article includes ceramic which is formed from zirconium oxide at a molar concentration ranging from about 96 mole % to about 94 mole %, and yttrium oxide at a molar concentration ranging from about 4 mole % to about 6 mole %.
Abstract:
A plasma reactor for processing a semiconductor workpiece includes a reactor chamber and a set of plural parallel ion shower grids that divide the chamber into an upper ion generation region and a lower reactor region, each of the ion shower grids having plural orifices in mutual registration from grid to grid, each orifice being oriented in a non-parallel direction relative to a surface plane of the respective ion shower grid. A workpiece support in the process region faces the lowermost one of the ion shower grids. A reactive species source furnishes into the ion generation region a chemical vapor deposition precursor species. The reactor further includes a vacuum pump coupled to the reactor region, a plasma source power applicator for generating a plasma in the ion generation region and a grid potential source coupled to the set of ion shower grids. The orifices through at least some of the ion shower grids have an aspect ratio sufficient to limit ion trajectories in the reactor region to a narrow angular range about the non-parallel direction, and a resistance to gas flow sufficient to support a pressure drop between the ion generation and reactor regions of about at least a factor of 4. The grid potential source can be capable of applying different voltages to different ones of the grids.