Apparatus and method for differential in situ cleaning
First Claim
1. A workpiece processing apparatus, comprising:
- an extraction plate having an extraction aperture and a cleaning aperture;
a plasma chamber in communication with the extraction aperture, wherein the extraction plate defines an exterior wall of the plasma chamber;
a sealed volume disposed within the plasma chamber and in communication with the cleaning aperture;
a tube mass flow controller in communication with the sealed volume to control a flow of a cleaning gas into the sealed volume; and
a plasma generator, wherein the plasma generator excites gasses disposed within the plasma chamber and the cleaning gas disposed within the sealed volume.
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Accused Products
Abstract
A workpiece processing apparatus allowing in situ cleaning of metal deposited formed on the extraction plate and in the plasma chamber is disclosed. The apparatus includes an extraction plate having an extraction aperture through which the sputtering material is passed. The apparatus also includes a sealed volume disposed within the plasma chamber which is in communication with a cleaning aperture on the extraction plate. The sealed volume is in communication with a cleaning gas, which is excited by the plasma in the plasma chamber, and can be used to clean the exterior surface of the extraction plate. The feed gas used in the plasma chamber can be selected from a sputtering species and the cleaning gas. Since the volume in the sealed volume is separated from the rest of the plasma chamber, the cleaning of the extraction plate and the cleaning of the plasma chamber may be performed independently.
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Citations
18 Claims
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1. A workpiece processing apparatus, comprising:
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an extraction plate having an extraction aperture and a cleaning aperture; a plasma chamber in communication with the extraction aperture, wherein the extraction plate defines an exterior wall of the plasma chamber; a sealed volume disposed within the plasma chamber and in communication with the cleaning aperture; a tube mass flow controller in communication with the sealed volume to control a flow of a cleaning gas into the sealed volume; and a plasma generator, wherein the plasma generator excites gasses disposed within the plasma chamber and the cleaning gas disposed within the sealed volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A workpiece processing apparatus, comprising:
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an extraction plate having an extraction aperture and a cleaning aperture; a plasma chamber in communication with the extraction aperture, wherein the extraction plate defines an exterior wall of the plasma chamber; a sealed volume disposed within the plasma chamber and in communication with the cleaning aperture; a plasma generator, wherein the plasma generator excites gasses disposed within the plasma chamber and gas disposed within the sealed volume; and a controller to control a flow of feed gas into the plasma chamber, a flow of a cleaning gas into the plasma chamber and a flow of cleaning gas into the sealed volume, so as to independently control cleaning of an interior of the plasma chamber and an exterior surface of the extraction plate. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification