Apparatus and methods for heating tunability in processing chambers
Embodiments herein are generally directed to electronic device manufacturing and, more particularly, to systems and methods for lamp heating in thermal processing chambers. In one embodiment, a substrate processing chamber includes a lid, a floor, and a processing volume between the lid and the floor. An upper window is disposed between the lid and the processing volume, a lower window is disposed between the floor and the processing volume. A lamp head is disposed between the lower window and the floor or between the upper window and the lid. At least one lamp is disposed within the lamp head, and a lens is disposed between the lamp head and the processing volume. In another embodiment, a plurality of lamps is disposed within the lamp head including at least one first lamp operating at a first wavelength and at least one second lamp operating at a second wavelength.
1 . A substrate processing chamber, comprising:
a chamber body comprising a lid, a floor, and a processing volume disposed between the lid and the floor;
an upper window disposed between the lid and the processing volume;
a lower window disposed between the floor and the processing volume;
a substrate support assembly disposed in the processing volume;
a lamp head disposed either between the upper window and the lid or between the lower window and the floor;
at least one lamp disposed within the lamp head;
a lens disposed between the lamp head and the processing volume; and
an actuation mechanism configured to shorten or lengthen a distance between the lamp head and the lens.
2 . The substrate processing chamber of claim 1 , wherein the lens is a convex lens.
3 . The substrate processing chamber of claim 1 , wherein the lens is a Luneburg lens.
4 . The substrate processing chamber of claim 1 , wherein the lens is a Fresnel lens.
5 . The substrate processing chamber of claim 1 , wherein the lens is a fluid-filled lens.
6 . The substrate processing chamber of claim 1 , further comprising an actuation mechanism coupled to the lens configured to actuate the lens relative to the lamp head.
7 . The substrate processing chamber of claim 1 , wherein the lens is further configured to focus a radiance from a lamp towards an area of a substrate disposed on the substrate support assembly.
8 . The substrate processing chamber of claim 7 , wherein the lens is actuated by an actuation mechanism to focus the radiance from the lamp towards the area of the substrate.
9 . The substrate processing chamber of claim 1 , wherein the actuation mechanism is configured to shorten or lengthen a distance between the lens and the upper window.
10 . The substrate processing chamber of claim 1 , wherein the actuation mechanism is configured to shorten or lengthen a distance between the lens and the lower window.
11 . A substrate processing chamber, comprising:
a chamber body comprising a lid, a floor, and a processing volume disposed between the lid and the floor;
an upper window disposed between the lid and the processing volume;
a lower window disposed between the floor and the processing volume;
a substrate support assembly disposed in the processing volume;
a lamp head disposed between the lower window and the floor or between the upper window and the lid;
a plurality of lamps disposed within the lamp head, the plurality of lamps comprising:
at least one first lamp operating at a first wavelength; and
at least one second lamp operating at a second wavelength different than the first wavelength
a lens disposed between the lamp head and the lower window or between the lamp head and the upper window; and
an actuation mechanism configured to shorten or lengthen a distance between the lamp head and the lens.
12 . The substrate processing chamber of claim 11 , wherein the at least one first lamp comprises an array of first lamps and the at least one second lamp comprises an array of second lamps.
13 . The substrate processing chamber of claim 12 , wherein the array of first lamps is interspersed between the array of second lamps.
14 . The substrate processing chamber of claim 12 , wherein the array of first lamps and the array of second lamps form a pattern across a radiating surface of the lamp head.
15 . The substrate processing chamber of claim 11 , wherein the at least one second lamp is a circular lamp disposed along a perimeter of the lamp head.
16 . The substrate processing chamber of claim 11 , wherein the first wavelength is between 750 nm and 1300 nm.
17 . The substrate processing chamber of claim 11 , wherein the second wavelength is between 100 nm and 400 nm.
18 . A method of heating a substrate, comprising:
measuring a thermal intensity of a thermal profile, using a system of pyrometers, of an area of a substrate disposed on a substrate support proximate a lamp and a lens, the lens disposed between the lamp and the substrate support;
determining if the thermal intensity is outside of desired parameters; and
in response to the thermal intensity being outside of desired parameters, adjusting a focal length of a lens assembly using an actuation mechanism coupled to the lens assembly, wherein the actuation mechanism is configured to shorten or lengthen a distance between the lamp and the lens.
19 . The method of claim 18 , in response to adjusting the focal length, measuring the thermal intensity and determining if the thermal intensity is within desired parameters.
20 . The method of claim 18 , wherein adjusting the focal length comprises receiving input from a user interface; and
in response to receiving the input, adjusting the focal length based on the input.
21 . The method of claim 18 , wherein adjusting the focal length comprises receiving instructions from a controller coupled to the actuation mechanism and the system of pyrometers to adjust to a pre-determined focal length.
22 . The method of claim 18 , further comprising:
prior to measuring a thermal intensity of a thermal profile, placing a substrate on a substrate support in a processing chamber, wherein the processing chamber comprises a lamp head; and
heating the substrate using the lamp head, wherein the lamp head comprises at least one first lamp operating at a first frequency and at least one second lamp operating at a second frequency.