APPARATUS FOR DETERMINING PROCESS RATE
First Claim
1. An apparatus for processing a substrate, comprisinga processing chamber;
- a substrate support within the processing chamber;
a gas inlet for providing a process gas into the processing chamber, wherein when a substrate is processed in the processing chamber the process provides a gas byproduct;
a gas source for providing the process gas to the gas inlet;
an exhaust pump for pumping gas from the processing chamber;
a gas byproduct measurement system, comprising;
an IR light source; and
an IR detector; and
a controller controllably connected to the gas source and IR light source and which receives signals from the IR detector, wherein the controller comprises;
at least one processor; and
computer readable media, comprising;
computer readable code for flowing the process gas into the etch chamber;
computer readable code for processing data from the IR detector;
computer readable code for using the processed data from the IR detector for determining concentration of the gas byproduct; and
computer readable code for using the determined concentration of the gas byproduct for adjusting the flow of the process gas into the processing chamber.
1 Assignment
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Accused Products
Abstract
An apparatus for processing a substrate is provided. A substrate support is located within a processing chamber. A gas inlet provides a process gas into the processing chamber. An exhaust pump pumps gas from the processing chamber. A gas byproduct measurement system comprises an IR light source and an IR detector. A controller comprises at least one processor and computer readable media. The computer readable media comprises computer readable code for flowing the process gas into the etch chamber, for processing data from the IR detector, for using the processed data from the IR detector for determining concentration of the gas byproduct, and for using the determined concentration of the gas byproduct for adjusting the flow of the process gas into the processing chamber.
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Citations
19 Claims
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1. An apparatus for processing a substrate, comprising
a processing chamber; -
a substrate support within the processing chamber; a gas inlet for providing a process gas into the processing chamber, wherein when a substrate is processed in the processing chamber the process provides a gas byproduct; a gas source for providing the process gas to the gas inlet; an exhaust pump for pumping gas from the processing chamber; a gas byproduct measurement system, comprising; an IR light source; and an IR detector; and a controller controllably connected to the gas source and IR light source and which receives signals from the IR detector, wherein the controller comprises; at least one processor; and computer readable media, comprising; computer readable code for flowing the process gas into the etch chamber; computer readable code for processing data from the IR detector; computer readable code for using the processed data from the IR detector for determining concentration of the gas byproduct; and computer readable code for using the determined concentration of the gas byproduct for adjusting the flow of the process gas into the processing chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for processing a substrate, comprising
a processing chamber; -
a substrate support within the processing chamber; a gas inlet for providing a process gas into the processing chamber, wherein when a substrate is processed in the processing chamber the process provides a gas byproduct; a gas source for providing the process gas to the gas inlet; an exhaust pump for pumping gas from the processing chamber; a gas byproduct measurement system, comprising; an IR light source; a confinement ring surrounding a volume above the substrate support; at least one minor for reflecting IR light within the confinement ring; and an IR detector positioned to receive light from the IR light source after the light is reflected within the confinement ring a plurality of times. - View Dependent Claims (17)
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18. An apparatus for processing a substrate, comprising
a processing chamber; -
a substrate support within the processing chamber; a gas inlet for providing a process gas into the processing chamber, wherein when a substrate is processed in the processing chamber the process provides a gas byproduct; a gas source for providing the process gas to the gas inlet; an exhaust pump for pumping gas from the processing chamber; a gas byproduct measurement system, comprising; a quantum cascade laser for providing IR light; a gas cell, which receives exhaust from the exhaust pump; at least one minor within the gas cell, which is reflective on IR light; and an IR detector positioned to receive light from the quantum cascade laser after the light is reflected a plurality of times within the gas cell. - View Dependent Claims (19)
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Specification