摘要:
Methods and systems for controlling temperatures in plasma processing chamber with reduced controller response times and increased stability. Temperature control is based at least in part on a feedforward control signal derived from a plasma power input into the processing chamber. A feedforward control signal compensating disturbances in the temperature attributable to the plasma power may be combined with a feedback control signal counteracting error between a measured and desired temperature.
摘要:
Methods and systems for controlling temperatures in plasma processing chamber for a wide range of setpoint temperatures and reduced energy consumption. Temperature control is coordinated between a coolant liquid loop and a heat source by a control algorithm implemented by the plasma processing module controller. The control algorithm may completely stop the flow of coolant liquid to a temperature-controlled component in response to a feedback signal indicating an actual temperature is below the setpoint temperature. The control algorithm may further be based at least in part on a feedforward control signal derived from a plasma power or change in plasma power input into the processing chamber during process recipe execution.
摘要:
Methods and systems for controlling temperatures in plasma processing chamber for a wide range of setpoint temperatures and reduced energy consumption. Temperature control is coordinated between a coolant liquid loop and a heat source by a control algorithm implemented by the plasma processing module controller. The control algorithm may completely stop the flow of coolant liquid to a temperature-controlled component in response to a feedback signal indicating an actual temperature is below the setpoint temperature. The control algorithm may further be based at least in part on a feedforward control signal derived from a plasma power or change in plasma power input into the processing chamber during process recipe execution.
摘要:
The invention is embodied in a plasma reactor for processing a semiconductor wafer, the reactor having a gas distribution plate including a front plate in the chamber and a back plate on an external side of the front plate, the gas distribution plate comprising a gas manifold adjacent the back plate, the back and front plates bonded together and forming an assembly. The assembly includes an array of holes through the front plate and communicating with the chamber, at least one gas flow-controlling orifice through the back plate and communicating between the manifold and at least one of the holes, the orifice having a diameter that determines gas flow rate to the at least one hole. In addition, an array of pucks is at least generally congruent with the array of holes and disposed within respective ones of the holes to define annular gas passages for gas flow through the front plate into the chamber, each of the annular gas passages being non-aligned with the orifice.
摘要:
The invention is embodied in a plasma reactor for processing a semiconductor wafer, the reactor having a gas distribution plate including a front plate in the chamber and a back plate on an external side of the front plate, the gas distribution plate comprising a gas manifold adjacent the back plate, the back and front plates bonded together and forming an assembly. The assembly includes an array of holes through the front plate and communicating with the chamber, at least one gas flow-controlling orifice through the back plate and communicating between the manifold and at least one of the holes, the orifice having a diameter that determines gas flow rate to the at least one hole. In addition, an array of pucks is at least generally congruent with the array of holes and disposed within respective ones of the holes to define annular gas passages for gas flow through the front plate into the chamber, each of the annular gas passages being non-aligned with the orifice.
摘要:
An electrostatic chuck provides reduced electric field effects about its peripheral edge. In one version, the chuck comprises a dielectric covering an electrode having a perimeter and a wire loop extending about the perimeter, the wire loop having a radially outwardly facing surface that is substantially rounded. Alternatively, the electrode may have a central planar portion comprising a top surface and a bottom surface, and a peripheral arcuate portion having a tip with a curvature length of at least about π/8 radians between a normal to the top surface of the central planar portion and a normal to the upper surface of the tip. The electrostatic chuck is used to hold a substrate in a process chamber of a substrate processing apparatus.
摘要:
A substrate support comprises an electrode and a dielectric layer covering the electrode, the dielectric layer having a surface to receive a substrate. A gas feed-through provides a gas to the surface of the dielectric layer and comprises a conduit extending through one or more of the dielectric layer and electrode. A dielectric insert in the gas feed-through has a passage therein that allows the gas to be flowed therethrough. Two opposing electrically conducting cups are around the passage in the dielectric insert.
摘要:
A plasma reactor embodying the invention includes a wafer support and a chamber enclosure member having an interior surface generally facing the wafer support. At least one miniature gas distribution plate for introducing a process gas into the reactor is supported on the chamber enclosure member and has an outlet surface which is a fraction of the area of the interior surface of said wafer support. A coolant system maintains the chamber enclosure member at a low temperature, and the miniature gas distribution plate is at least partially thermally insulated from the chamber enclosure member so that it is maintained at a higher temperature by plasma heating.
摘要:
A method and apparatus for controlling a temperature of a wafer during processing such as in a gas plasma or nonplasma environment wherein a wafer is positioned on a chuck. The wafer is heated and a pressurized gas is introduced into a space between the wafer and the chuck such that the pressurized gas transfers heat from the wafer to the chuck. Pressure of the pressuried gas is automatically varied such that heat transfer between the wafer and the chuck is varied in response to a difference between an actual wafer temperature and a desired wafer temperature to maintain the desired wafer temperature.
摘要:
A method and apparatus for controlling a temperature of a wafer during processing such as in a gas plasma or nonplasma environment wherein a wafer is positioned on a chuck. The wafer is heated and a pressurized gas is introduced into a space between the wafer and the chuck such that the pressurized gas transfers heat from the wafer to the chuck. Pressure of the pressurized gas is automatically varied such that heat transfer between the wafer and the chuck is varied in response to a difference between an actual wafer temperature and a desired wafer temperature to maintain the desired wafer temperature.