Thermally isolated cryopanel for vacuum deposition systems
View Patent ↗The present invention relates to vacuum depositions systems and related deposition methods. Vacuum deposition systems that use one or more cyropanels for localized pumping of a deposition region where a substrate is positioned are provided. The present invention is particularly applicable to pumping and minimizing reevaporation of high vapor pressure deposition materials during molecular beam epitaxy.
1. An ultra high vacuum deposition system, the deposition system comprising:
a vacuum chamber comprising a deposition region wherein a substrate can be positioned for deposition and a port that can operatively position a source of deposition material relative to the deposition region; and
a cooling and pumping system comprising:
a liquid cooling panel at least partially surrounding the deposition region; and
a cryogenic pumping panel distinct from the liquid cooling panel and at least partially surrounding the liquid cooling panel wherein the liquid cooling panel substantially shields the cryogenic pumping panel from thermal radiation generated by the source of deposition material when the source of deposition material is positioned in the port
wherein the liquid cooling panel comprises a plurality of openings that allow gas to move from the deposition region to the cryogenic pumping panel.
2. The deposition system of claim 1 , wherein the liquid cooling panel comprises a body portion and a neck portion extending from the body portion.
3. The deposition system of claim 2 , wherein the neck portion of the liquid cooling panel is annular.
4. The deposition system of claim 2 , wherein the cryogenic pumping panel is nested with the neck of the liquid cooling panel.
5. The deposition system of claim 2 , wherein the body portion of the liquid cooling panel comprises an opening aligned with the port for receiving the source of deposition material when the source of deposition material is positioned in the port.
6. The deposition system of claim 1 , wherein the cryogenic pumping panel comprises an annular body.
7. The deposition system of claim 6 , wherein the annular body comprises a plurality of radially extending chambers.
8. The deposition system of claim 6 , wherein the annular body comprises a plurality of tubes extending between an inside and outside surface of the annular body.
9. The deposition system of claim 1 , further comprising at least one additional port for at least one additional source of deposition material.
10. The deposition system of claim 1 , in combination with a source of deposition material.
11. The deposition system of claim 1 , in combination with a substrate heater.