Higher power density downstream plasma
First Claim
1. A method for treating one or more articles with a plasma generated from dissociating one or more gases, said method comprising:
- supplying one or more gases from a source to a first chamber, including a means for controlling expansion of a plasma back through said source from said first chamber;
applying RF power to dissociate said one or more gases and create said plasma;
withdrawing said dissociated one or more gases from said first chamber through at least one constriction, wherein said at least one constriction is sized to modify a power density of said plasma near said at least one constriction; and
supplying said dissociated one or more gases to a second chamber containing said one or more articles.
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Accused Products
Abstract
A method and system to obtain a high power density plasma to efficiently generate high concentrations of plasma downstream from one or more plasma sources. A first embodiment of the invention involves a method to provide an improved power density for dissociating one or more gases to create plasma. A second embodiment of the invention involves a method to provide multiple chambers for dissociating one or more gases to create plasma. A third embodiment involves an apparatus using a constriction in a discharge chamber containing one or more gases, to provide an improved power density for dissociating one or more gases to create plasma. A fourth embodiment involves an apparatus using a constriction in multiple discharge chambers containing one or more gases, to provide an improved power density for dissociating one or more gases to create plasma.
116 Citations
28 Claims
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1. A method for treating one or more articles with a plasma generated from dissociating one or more gases, said method comprising:
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supplying one or more gases from a source to a first chamber, including a means for controlling expansion of a plasma back through said source from said first chamber;
applying RF power to dissociate said one or more gases and create said plasma;
withdrawing said dissociated one or more gases from said first chamber through at least one constriction, wherein said at least one constriction is sized to modify a power density of said plasma near said at least one constriction; and
supplying said dissociated one or more gases to a second chamber containing said one or more articles. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for treating one or more articles with plasma generated by dissociating one or more gases, said method comprising:
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supplying one or more gases from a first source to a first chamber;
applying RF power to dissociate said one or more gases from said first source to create a first plasma;
withdrawing said first plasma from said first chamber through a first constriction;
supplying one or more gases from a second source to a second chamber for RF power to dissociate said one or more gases from said second source to create a second plasma;
using a second constriction to withdraw said second plasma from said second chamber; and
supplying said first plasma from said first chamber and said second plasma from said second chamber to a third chamber containing said one or more articles. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An apparatus for dissociating one or more gases to produce a plasma, said apparatus comprising:
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a first chamber with at least one constriction, having a first port coupled to a first source of one or more gases, including means for controlling expansion of a plasma in said first chamber back through said first port, one or more RF energy sources coupled to said first chamber, means for dissociating said one or more gases in said first chamber into said plasma, and a second chamber coupled to said first chamber, wherein said second chamber contains one or more articles. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An apparatus to dissociate one or more gases to produce plasma, said apparatus comprising:
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a first chamber with a first constriction, having a first port coupled to a first source of one or more gases, including means for controlling expansion of a plasma in said first chamber back through said first port, a second chamber with a second constriction, having a second port coupled to a second source of one or more gases, including means for controlling expansion of a plasma in said second chamber back through said second port, one or more RF energy sources coupled to said first chamber and said second chamber, means for dissociating said one or more gases from said first port into a first plasma in said first chamber, means for dissociating said one or more gases from said second port into a second plasma in said second chamber; and
a third chamber coupled to said first chamber and said second chamber, wherein said third chamber contains one or more articles. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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Specification