Apparatus and method for treating a substrate with UV radiation using primary and secondary reflectors
First Claim
1. A substrate processing tool comprising:
- a body defining a substrate processing region;
a substrate support adapted to support a substrate within the substrate processing region;
an ultraviolet (UV) radiation lamp spaced apart from the substrate support and configured to generate and transmit ultraviolet radiation to a substrate positioned on the substrate support, the UV radiation lamp comprising a source of UV radiation and a primary reflector partially surrounding the source of UV radiation, anda secondary reflector positioned between the primary reflector and the substrate support, the secondary reflector adapted to redirect ultraviolet radiation that would otherwise not contact the substrate towards the substrate, wherein the UV radiation lamp generates a substantially rectangular flood pattern of UV radiation and the secondary reflector alters the flood pattern to a substantially circular flood pattern.
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Abstract
Embodiments of the invention relate generally to an ultraviolet (UV) cure chamber for curing a dielectric material disposed on a substrate and to methods of curing dielectric materials using UV radiation. A substrate processing tool according to one embodiment comprises a body defining a substrate processing region; a substrate support adapted to support a substrate within the substrate processing region; an ultraviolet radiation lamp spaced apart from the substrate support, the lamp configured to transmit ultraviolet radiation to a substrate positioned on the substrate support; and a motor operatively coupled to rotate at least one of the ultraviolet radiation lamp or substrate support at least 180 degrees relative to each other. The substrate processing tool may further comprise one or more reflectors adapted to generate a flood pattern of ultraviolet radiation over the substrate that has complementary high and low intensity areas which combine to generate a substantially uniform irradiance pattern if rotated. Other embodiments are also disclosed.
449 Citations
33 Claims
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1. A substrate processing tool comprising:
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a body defining a substrate processing region; a substrate support adapted to support a substrate within the substrate processing region; an ultraviolet (UV) radiation lamp spaced apart from the substrate support and configured to generate and transmit ultraviolet radiation to a substrate positioned on the substrate support, the UV radiation lamp comprising a source of UV radiation and a primary reflector partially surrounding the source of UV radiation, and a secondary reflector positioned between the primary reflector and the substrate support, the secondary reflector adapted to redirect ultraviolet radiation that would otherwise not contact the substrate towards the substrate, wherein the UV radiation lamp generates a substantially rectangular flood pattern of UV radiation and the secondary reflector alters the flood pattern to a substantially circular flood pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A substrate processing system comprising:
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a body defining first and second processing regions that are separate and adjacent to one another; a first substrate support adapted to support a substrate within the first processing region and a second substrate support adapted to support a substrate within the second processing region; a first UV radiation lamp module spaced apart from the first substrate support and configured to transmit ultraviolet radiation to a first substrate positioned on the first substrate support; a second UV radiation lamp module spaced apart from the second substrate support and configured to transmit ultraviolet radiation to a second substrate positioned on the second substrate support; a first secondary reflector positioned between the first UV lamp module and the substrate support and adapted to redirect ultraviolet radiation that would otherwise not contact the first substrate towards the first substrate; and a second secondary reflector positioned between the second UV lamp module and the second substrate support and adapted to redirect ultraviolet radiation that would otherwise not contact the second substrate towards the second substrate, wherein the first UV radiation lamp module generates a substantially rectangular flood pattern of UV radiation and the first secondary reflector alters the flood pattern to a substantially circular flood pattern, and wherein the second UV radiation lamp module generates a substantially rectangular flood pattern of UV radiation and the second secondary reflector alters the flood pattern to a substantially circular flood pattern. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. An apparatus for generating a substantially circular flood pattern of ultraviolet radiation, the apparatus comprising:
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an ultraviolet (UV) radiation lamp comprising an elongated source of UV radiation and a primary reflector partially surrounding the elongated source of UV radiation, wherein the elongated source of UV radiation and primary reflector combine to generate a substantially rectangular flood pattern of UV radiation; and a secondary reflector spaced apart from the primary reflector and adapted to redirect portions of the rectangular flood pattern of UV radiation that impinge upon the secondary reflector to generate the substantially circular flood pattern of UV radiation. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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32. A substrate processing tool comprising:
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a body defining a substrate processing region; a substrate support adapted to support a substrate within the substrate processing region; an ultraviolet (UV) radiation lamp spaced apart from the substrate support and configured to generate a substantially rectangular flood pattern of UV radiation and transmit ultraviolet radiation to a substrate positioned on the substrate support, the UV radiation lamp comprising a source of UV radiation and a primary reflector partially surrounding the source of UV radiation, and a secondary reflector positioned between the primary reflector and the substrate support, the secondary reflector configured to reduce light loss outside the substrate and improve uniformity of irradiance across the surface of the substrate by reshaping a substantially rectangular flood pattern of light generated by the UV radiation lamp into a substantially circular flood pattern.
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33. A method of curing a layer of dielectric material formed over a substrate, the method comprising:
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placing the substrate having the dielectric material formed thereon on a substrate support in a substrate processing chamber; exposing the substrate to ultraviolet radiation by generating a substantially rectangular flood pattern of UV radiation with a UV source and primary reflector and reshaping the substantially rectangular flood pattern into a substantially circular flood pattern of UV radiation with a secondary reflector positioned between the primary reflector and the substrate support.
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Specification