RF plasma reactor with hybrid conductor and multi-radius dome ceiling
First Claim
1. A plasma reactor for processing a workpiece, comprising:
- a pedestal defining thereon a workstation of diameter d to support a workpiece of a similar diameter on said pedestal within the reactor;
a chamber enclosure including a side wall having a top and a ceiling having a base over said top of said side wall;
an inductive coil adjacent said ceiling and capable of being coupled to an RF power supply;
said base being at a height h above said pedestal and said ceiling having an apex at a height H above said base, wherein H+h is in the angle of approximately 4" to 7" for said workstation diameter d within a range between about 6" and about 12".
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Accused Products
Abstract
An inductively coupled RF plasma reactor for processing semiconductor wafer includes a reactor chamber having a side wall and a ceiling, a wafer pedestal for supporting the wafer in the chamber, an RF power source, apparatus for introducing a processing gas into the reactor chamber, and a coil inductor adjacent the reactor chamber connected to the RF power source, the coil inductor including (a) a side section facing a portion of the side wall and including a bottom winding and a top winding, the top winding being at a height corresponding at least approximately to a top height of the ceiling, and (b) a top section extending radially inwardly from the top winding of the side section so as to overlie at least a substantial portion of the ceiling. The present invention adheres to an optimized coil-dome geometry including a particular dome apex height range relative to the dome base and a particular wafer position range relative to the dome apex.
34 Citations
13 Claims
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1. A plasma reactor for processing a workpiece, comprising:
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a pedestal defining thereon a workstation of diameter d to support a workpiece of a similar diameter on said pedestal within the reactor; a chamber enclosure including a side wall having a top and a ceiling having a base over said top of said side wall; an inductive coil adjacent said ceiling and capable of being coupled to an RF power supply; said base being at a height h above said pedestal and said ceiling having an apex at a height H above said base, wherein H+h is in the angle of approximately 4" to 7" for said workstation diameter d within a range between about 6" and about 12". - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A plasma reactor for processing a workpiece, comprising:
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a pedestal defining thereon a workstation of diameter d to support a workpiece of a similar diameter on said pedestal within the reactor; a chamber enclosure including a vertical side wall having a top and a ceiling having a base underlying said top of said side wall, said ceiling comprising a multi-radius dome having at least a center radius R and a corner radius r less than the center radius R, wherein R/r is in a range between on the order of about 2 and about 10; an inductive coil overlying said ceiling and capable of being coupled to an RF power supply; said vertical side wall top being at a height h above said pedestal and said ceiling having an apex at a height H above said ceiling base, wherein H+h is in a range of between about 4" and 7". - View Dependent Claims (10, 11, 12, 13)
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Specification