High temperature susceptor
First Claim
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1. An apparatus, comprising:
- a planar substrate mounting surface having an area;
a lip surrounding the substrate mounting surface and defining said area;
having a height above the mounting surface and a first rounded edge between an inner edge and the planar surface, the lip further having a top side and an outer side, and a second rounded edge coupling the outer side to the top side.
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Abstract
A susceptor with improved resistance to thermal cycling and chemical attack between processing and cleaning cycles. The susceptor comprises a top surface is surrounded by a lip, the lip having a beveled inner side, a top side, an outer side, a first rounded edge between the top side and the outer side, a second rounded edge between the top side and the inner side, and a third rounded edge between the inner side and the top surface. The susceptor comprises a body of graphite covered by a coating of aluminum nitride.
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Citations
22 Claims
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1. An apparatus, comprising:
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a planar substrate mounting surface having an area; a lip surrounding the substrate mounting surface and defining said area;
having a height above the mounting surface and a first rounded edge between an inner edge and the planar surface, the lip further having a top side and an outer side, and a second rounded edge coupling the outer side to the top side. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A susceptor for a chemical vapor deposition chamber, comprising:
a wafer support surface having a recessed planar surface and a lip, the lip portion having a beveled inner side, a top side and an outer sides and further including a rounded base edge between the inner side and recessed planar surface. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A susceptor for use in chemical vapor deposition, comprising:
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a body comprised of graphite material, the body having a top surface defining a substrate holding area, the top surface surrounded by a lip, the lip having a beveled inner side, a top side, an outer side, a first rounded edge between the top side and the outer side, and a second rounded edge between the top side and the inner side, and a third rounded edge between the inner side and the top surface; and a coating covering the body, the coating comprising a film of aluminum nitride; wherein the graphite material comprising the body has a thermal coefficient closely matching the thermal coefficient of the AlN coating. - View Dependent Claims (19, 20, 21, 22)
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Specification