Abstract:
A method for cleaning a processing chamber that includes heating an inner surface of the processing chamber to a first temperature. The first temperature can be sufficient to cause a first species to become volatile. The first species can be one of several species deposited on the inner surface. A cleaning chemistry is injected into the processing chamber. The cleaning chemistry can be reactive with a second one of the species to convert the second species to the first species. The volatilized first species can also be output from the processing chamber. A system for cleaning the process chamber is also described.
Abstract:
An antenna arrangement for generating an rf field distribution at a plasma generating region inside a chamber wall of a process chamber of a plasma processing apparatus is described. The antenna arrangement includes an rf inductive antenna to which an rf power supply can be connected to supply an rf current to generate a first rf field extending into the plasma generating region. A passive antenna is also provided which is inductively coupled to the rf inductive antenna and configured to generate a second rf field modifying the first rf field. The rf field distribution at the plasma generating region increases the processing uniformity of the processing apparatus compared to that in the absence of the passive antenna.
Abstract:
A method for monitoring a device fabrication process. The method includes etching into a wafer disposed inside a chamber and detecting the intensity of a portion of a light reflected from a surface of the wafer and further scattered at a scattering inside surface of the chamber.
Abstract:
A glass workpiece processed in a vacuum plasma processing chamber is dechucked from a monopolar electrostatic chuck by gradually reducing the chucking voltage during processing while maintaining the voltage high enough to clamp the workpiece. The chucking voltage during processing is controlled in response to flow rate of a heat transfer fluid flowing to the chuck to maintain the chucking force and the flow rate approximately constant. A reverse polarity voltage applied to the chuck at the end of processing assists in dechucking. The workpiece temperature is maintained at a high value at the end of processing to assisting in dechucking. Peak current flowing through the chuck during workpiece lifting from the chuck controls the amplitude and/or duration of the reverse polarity voltage during the next dechucking operation. An inert plasma in the chamber removes residual charge from the workpiece after workpiece lifting from the chuck.
Abstract:
PROBLEM TO BE SOLVED: To provide a new improved method and a new improved apparatus for chucking and dechucking a workpiece electrostatically in a vacuum plasma processor. SOLUTION: A glass workpiece 32 processed in a vacuum plasma processing chamber 10 is dechucked by gradually reducing the chucking voltage during processing while maintaining the voltage high enough to clamp the workpiece. The chucking voltage during processing is controlled in response to chucking force and flow rate of a heat transfer fluid flowing to the chuck. A reverse polarity voltage applied to the chuck at the end of processing assists in dechucking. The workpiece temperature is maintained at a high value at the end of processing. A peak current flowing through the chuck during workpiece lifting from the chuck controls the amplitude and/or duration of the reverse polarity voltage during the next dechucking operation. An inert plasma in the chamber 10 removes a residual charge from the workpiece 32 after workpiece lifting from the chuck 30. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a reliable method and apparatus for electrostatically chucking and dechucking a workpiece in a vacuum plasma processor. SOLUTION: A glass workpiece 32 processed in a vacuum plasma processing chamber 10 is dechucked from a monopolar electrostatic chuck 30 by gradually reducing a chucking voltage during processing while maintaining the voltage high enough to clamp the workpiece. The chucking voltage during processing is controlled in response to a flow rate of a heat transfer fluid flowing to the chuck to maintain a chucking force and the flow rate substantially constant. A reverse polarity voltage applied to the chuck at an end of the processing assists in dechucking. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an improved method and apparatus for electrostatically chucking and dechucking a workpiece in a vacuum plasma processor. SOLUTION: A glass workpiece 32 being processed in a vacuum plasma processing chamber is dechucked from a monopolar electrostatic chuck by gradually reducing chucking voltage during the processing while voltage is maintained high enough to clamp the workpiece. A reverse polarity voltage, which is applied to the chuck at a final step of the processing, assists the dechucking. The workpiece temperature is maintained at a high value at the final step of the processing in order to assist the dechucking. Peak current flowing through the chuck during lifting of the workpiece from the chuck controls the amplitude and/or duration of the reverse polarity voltage during the next dechucking operation. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
A window of a plasma processing chamber. The window includes a first dielectric portion having a first electrical thickness and a first resistivity to an etching plasma that is formed within the plasma processing chamber. There is further included a second dielectric portion disposed within the first dielectric portion. The second dielectric portion has a second electrical thickness that is less than the first electrical thickness. The second dielectric portion is formed of a substantially transparent material and has a second resistivity to the etching plasma. The second resistivity is higher than the first resistivity.