Chemical vapor deposition chamber
First Claim
1. A face plate adapted to be installed above a substrate-support pedestal in a chemical vapor deposition chamber, the face plate comprising:
- a substantially planar body having a top surface and a bottom surface and having passages formed therethrough from the top surface to the bottom surface, the passages adapted to allow a process gas to flow therethrough, the substantially planar body having an outer periphery; and
a flange that extends downwardly from the outer periphery of the substantially planar body to form a recess in which the bottom surface is contained.
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Accused Products
Abstract
A processing chamber is adapted to perform a deposition process on a substrate. The chamber includes a pedestal adapted to hold a substrate during deposition and a gas mixing and distribution assembly mounted above the pedestal. The gas mixing and distribution assembly includes a face plate, a dispersion plate mounted above the face plate, and a mixing fixture mounted above the dispersion plate. The face plate is adapted to present an emissivity invariant configuration to the pedestal. The mixing fixture includes a mixing chamber to which a process gas is flowed and an outer chamber surrounding the mixing chamber. The processing chamber further includes an enclosure and a liner installed inside the enclosure and surrounding the pedestal. The liner defines a gap between the liner and the enclosure. The gap has a minimum width adjacent an exhaust port and a maximum width at a point that is diametrically opposite the exhaust port.
747 Citations
33 Claims
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1. A face plate adapted to be installed above a substrate-support pedestal in a chemical vapor deposition chamber, the face plate comprising:
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a substantially planar body having a top surface and a bottom surface and having passages formed therethrough from the top surface to the bottom surface, the passages adapted to allow a process gas to flow therethrough, the substantially planar body having an outer periphery; and
a flange that extends downwardly from the outer periphery of the substantially planar body to form a recess in which the bottom surface is contained. - View Dependent Claims (2, 3, 4, 5)
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6. A face plate adapted to be installed above a substrate-support pedestal in a chemical vapor deposition chamber, the face plate comprising:
a substantially planar body having;
a top surface;
a bottom surface; and
passages formed from the top surface to the bottom surface, the passages adapted to allow a process gas to flow therethrough, the passages forming openings in the bottom surface and forming openings in the top surface, the openings in the top surface having a diameter that is less than a diameter of the openings in the bottom surface;
wherein the openings in the top surface are adapted to provide the face plate with a larger thermal conductance near the openings in the top surface than near the openings in the bottom surface; and
wherein the openings in the bottom surface are adapted to trap and not reflect heat radiated toward the bottom of the face plate by a substrate positioned on the pedestal of the chamber. - View Dependent Claims (7)
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8. A face plate adapted to be installed above a substrate-support pedestal in a chemical vapor deposition chamber, the pedestal having a first diameter in a plane, the face plate comprising:
a substantially planar body having a top surface and a bottom surface and having passages formed therethrough from the top surface to the bottom surface to define a perforated region of the bottom surface, the passages adapted to allow a process gas to flow therethrough, the perforated region of the bottom surface having a second diameter in the plane that is larger than the first diameter of the pedestal. - View Dependent Claims (9, 10, 11)
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12. A method for use within a chemical vapor deposition chamber having a substrate-support pedestal, the method comprising:
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providing a face plate having;
a top surface;
a bottom surface; and
passages formed from the top surface to the bottom surface, the passages adapted to allow a process gas to flow therethrough, the passages forming openings in the bottom surface and forming openings in the top surface, the openings in the top surface having a diameter that is less than a diameter of the openings in the bottom surface;
wherein the openings in the top surface are adapted to provide the face plate with a larger thermal conductance near the openings in the top surface than near the openings in the bottom surface; and
wherein the openings in the bottom surface are adapted to trap and not reflect heat radiated toward the bottom of the face plate by a substrate positioned on the pedestal of the chamber;
positioning the face plate near the pedestal;
positioning a substrate on the pedestal;
flowing a process gas through the face plate; and
depositing a film on the substrate with the process gas.
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13. A processing chamber adapted to perform a deposition process on a substrate, comprising:
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an enclosure;
a pedestal positioned in the enclosure and adapted to hold a substrate during deposition;
a face plate positioned to deliver a process gas to a substrate positioned on the pedestal, the face plate comprising;
a top surface;
a bottom surface; and
passages formed from the top surface to the bottom surface, the passages adapted to allow a process gas to flow therethrough, the passages forming openings in the bottom surface and forming openings in the top surface, the openings in the top surface having a diameter that is less than a diameter of the openings in the bottom surface;
wherein the openings in the top surface are adapted to provide the face plate with a larger thermal conductance near the openings in the top surface than near the openings in the bottom surface; and
wherein the openings in the bottom surface are adapted to trap and not reflect heat radiated toward the bottom of the face plate by the substrate positioned on the pedestal of the chamber;
a dispersion plate positioned to deliver the process gas to the face plate and having a center axis, a top surface and a bottom surface and a plurality of passages extending radially from the center axis at respective inclined angles from the top surface to the bottom surface; and
a mixing fixture positioned to deliver the process gas to a central portion of the dispersion plate and having;
a body;
a mixing chamber formed in the body and adapted to receive a flow of the process gas;
an outer chamber formed in the body and surrounding the mixing chamber;
a first inlet through which a diluent gas flows to the outer chamber; and
at least one passage adapted to allow the diluent gas to flow from the outer chamber to the mixing chamber so as to dilute the process gas.
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14. An apparatus adapted to mix a process gas with a diluent gas, comprising:
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a body;
a mixing chamber formed in the body and adapted to receive a flow of the process gas;
an outer chamber formed in the body and surrounding the mixing chamber;
a first inlet through which the diluent gas flows to the outer chamber; and
at least one passage adapted to allow the diluent gas to flow from the outer chamber to the mixing chamber. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An Apparatus adapted to mix a process gas with a diluent gas, comprising:
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a body having a central axis;
a mixing chamber formed in the body at the central axis and adapted to receive a flow of the process gas;
an outer chamber formed in the body and surrounding the mixing chamber, the outer chamber being in fluid communication with the mixing chamber; and
an inlet through which the diluent gas flows to the outer chamber. - View Dependent Claims (28, 29)
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30. An apparatus adapted to mix a process gas with a diluent gas, comprising:
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a first chamber adapted to receive the process gas at a first pressure;
a second chamber adjacent the first chamber and adapted to receive the diluent gas and to hold the diluent gas at a second pressure that is higher than the first pressure; and
at least one passage adapted to allow the diluent gas to flow from the second chamber to the first chamber, the at least one passage providing substantial resistance to flow of the diluent gas from the second chamber to the first chamber. - View Dependent Claims (31, 32)
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33. A method of mixing a process gas and a diluent gas, comprising:
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flowing the process gas to a mixing chamber of a mixing fixture;
flowing the diluent gas to an outer chamber that surrounds the mixing chamber; and
allowing the diluent gas to enter the mixing chamber from the outer chamber.
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Specification