摘要:
In a plasma reactor having an electrostatic chuck, wafer voltage is determined from RF measurements at the bias input using previously determined constants based upon transmission line properties of the bias input, and this wafer voltage is used to accurately control the DC wafer clamping voltage.
摘要:
A plasma reactor has a dual frequency plasma RF bias power supply furnishing RF bias power comprising first and second frequency components, f(1), f(2), respectively, and an RF power path having an input end coupled to the plasma RF bias power supply and an output end coupled to the wafer support pedestal, and sensor circuits providing measurement signals representing first and second frequency components of a measured voltage and first and second frequency components of a measured current near the input end of the RF power path. The reactor further includes a processor for providing first and second frequency components of a wafer voltage signal as, respectively, a first sum of the first frequency components of the measured voltage and measured current multiplied by first and second coefficients respectively, and a second sum of the second frequency components of the measured voltage and measured current multiplied by third and fourth coefficients, respectively. A processor produces a D.C. wafer voltage by combining D.C. components of the first and second frequency components of the wafer voltage with an intermodulation correction factor that is the product of the D.C. components of the first and second components of the wafer voltage raised to a selected power and multiplied by a selected coefficient.
摘要:
A method of processing a workpiece in a chamber of a plasma reactor having a set of plural electromagnet coils includes selecting plural predetermined plasma density distributions relative to a workpiece surface, the predetermined plasma density distributions corresponding to different sets of D.C. currents in the coils, and flowing a process gas into the chamber and generating a plasma in the chamber. The method further includes switching plasma in the chamber between the predetermined plasma density distributions by switching D.C. currents through the coils between the different sets of D.C. currents.
摘要:
A method for processing a workpiece in a plasma reactor having a set of n coils includes constructing, for each one of the n coils, a set of plasma distributions for discrete values of coil current in a predetermined current range. The distributions are grouped, each group having one distribution for each of the n coils, and being a unique set of n distributions. A combined plasma distribution is computed from each group of distributions. The variance of each combined distribution is computed. The method further includes finding an optimum one of the combined distributions having an at least nearly minimum variance, and identifying the n coil currents associated with the optimum distribution. During plasma processing of the workpiece, currents through the coils are maintained at levels corresponding to the n coil currents associated with the one combined distribution.
摘要:
Apparatus and methods are provided for a power matching apparatus for use with a processing chamber. In one aspect of the invention, a power matching apparatus is provided including a first RF power input coupled to a first adjustable capacitor, a second RF power input coupled to a second adjustable capacitor, a power junction coupled to the first adjustable capacitor and the second adjustable capacitor, a receiver circuit coupled to the power junction, a high voltage filter coupled to the power junction and the high voltage filter has a high voltage output, a voltage/current detector coupled to the power junction and a RF power output connected to the voltage/current detector.
摘要:
Apparatus and methods are provided for a power matching apparatus for use with a processing chamber. In one aspect of the invention, a power matching apparatus is provided including a first RF power input coupled to a first adjustable capacitor, a second RF power input coupled to a second adjustable capacitor, a power junction coupled to the first adjustable capacitor and the second adjustable capacitor, a receiver circuit coupled to the power junction, a high voltage filter coupled to the power junction and the high voltage filter has a high voltage output, a voltage/current detector coupled to the power junction and a RF power output connected to the voltage/current detector.
摘要:
Apparatus and methods are provided for a power matching apparatus for use with a processing chamber. In one aspect of the invention, a power matching apparatus is provided including a first RF power input coupled to a first adjustable capacitor, a second RF power input coupled to a second adjustable capacitor, a power junction coupled to the first adjustable capacitor and the second adjustable capacitor, a receiver circuit coupled to the power junction, a high voltage filter coupled to the power junction and the high voltage filter has a high voltage output, a voltage/current detector coupled to the power junction and a RF power output connected to the voltage/current detector.
摘要:
A high density plasma dep/etch/dep method of depositing a dielectric film into a gap between adjacent raised structures on a substrate disposed in a substrate processing chamber. The method deposits a first portion of the dielectric film within the gap by forming a high density plasma from a first gaseous mixture flown into the process chamber, etches the deposited first portion of the dielectric film by flowing an etchant gas comprising CxFy, where a ratio of x to y is greater than or equal to 1:2 and then deposits a second portion of the dielectric film over the first portion by forming a high density plasma from a second gaseous mixture flown into the process chamber.
摘要:
A plasma reactor includes a vacuum enclosure including a side wall and a ceiling defining a vacuum chamber, and a workpiece support within the chamber and facing the ceiling for supporting a planar workpiece, the workpiece support and the ceiling together defining a processing region between the workpiece support and the ceiling. Process gas inlets furnish a process gas into the chamber. A plasma source power electrode is connected to an RF power generator for capacitively coupling plasma source power into the chamber for maintaining a plasma within the chamber. The reactor further includes at least a first overhead solenoidal electromagnet adjacent the ceiling, the overhead solenoidal electromagnet, the ceiling, the side wall and the workpiece support being located along a common axis of symmetry. A current source is connected to the first solenoidal electromagnet and furnishes a first electric current in the first solenoidal electromagnet whereby to generate within the chamber a magnetic field which is a function of the first electric current, the first electric current having a value such that the magnetic field increases uniformity of plasma ion density radial distribution about the axis of symmetry near a surface of the workpiece support.
摘要:
A high density plasma dep/etch/dep method of depositing a dielectric film into a gap between adjacent raised structures on a substrate disposed in a substrate processing chamber. The method deposits a first portion of the dielectric film within the gap by forming a high density plasma from a first gaseous mixture flown into the process chamber, etches the deposited first portion of the dielectric film by flowing an etchant gas comprising CxFy, where a ratio of x to y is greater than or equal to 1:2 and then deposits a second portion of the dielectric film over the first portion by forming a high density plasma from a second gaseous mixture flown into the process chamber.