Heat transfer to ampoule trays
The invention is directed to a vaporizer or ampoule assembly with improved heat transfer between a vaporizer vessel body and at least one support tray located therein. In particular, there is provided a heat transfer enhancing member that is disposed between a vessel body and support tray. In one example of a heat transfer enhancing member or assembly there is included a heat conductive mesh or liner around totally or partially around the support tray that is wedged in between the support tray and the interior diameter or wall of the vessel body. In a related embodiment, the heat transfer enhancing member includes an expandable support tray sidewall to increase physical contact between the support tray and the vessel body interior wall.
1. A vapor delivery vessel assembly for vaporizing and delivering vaporized source material, the vessel assembly comprising:
a vessel body having an interior volume defined by a base and a sidewall, the sidewall defining an interior diameter of the vessel and having an interior sidewall surface;
a gas inlet and a gas outlet arranged in fluid communication with the interior volume, the gas inlet being adapted to supply a first gas to the interior volume of the vessel;
a vented support tray disposed within the interior volume and adjacent the sidewall of the vessel body, the support tray adapted to support a vaporizable source material in the flow path extending between the gas inlet and the gas outlet; and
a heat transfer enhancing member located between the vessel sidewall and the vented support tray, the heat transfer enhancing member adapted to reduce any air gaps between the vessel body sidewall and the support tray, wherein
the heat transfer enhancing member includes a heat conductive mesh liner adapted to be located between and in contact with the vessel body sidewall and the support tray;
the heat transfer enhancing member includes a heat conductive oil or grease material adapted to be located between and in contact with the vessel body sidewall and an edge or sidewall of the support tray; or
the heat transfer enhancing member includes a circumferential sidewall assembly that extends upwards from and is in contact with the support tray, the sidewall assembly adapted to expand radially out towards the sidewall of the vessel body to increase surface area physical contact between the support tray and the interior sidewall surface of the vessel body.
2. The vapor delivery vessel assembly of claim 1 , wherein the heat conductive mesh liner is located to be partially about the support tray and is adapted to laterally shift the support tray within the interior volume to increase surface area physical contact between an edge or sidewall of the support tray and the interior sidewall surface of the vessel body.
3. The vapor delivery vessel assembly of claim 1 , wherein the heat transfer enhancing member further includes a foam or mesh liner member adapted to absorb the heat conductive oil or grease material, the foam or mesh liner member adapted to be disposed partially or totally about the support tray.
4. The vapor delivery vessel assembly of claim 1 , wherein the sidewall assembly includes a section that is partially expandable radially out towards the sidewall of the vessel body to shift the support tray within the interior vessel volume to increase surface area physical contact between the support tray and the interior sidewall surface of the vessel body.
5. The vapor delivery vessel assembly of claim 1 , wherein an outer diameter of the sidewall assembly includes a groove or channel adapted to receive a C-ring member, the C-ring member adapted to be compressed upon insertion of the support tray within the vessel body interior volume and adapted to shift the support tray within the interior vessel volume to increase surface area physical contact between the support tray and the interior sidewall surface of the vessel body.
6. The vapor delivery vessel of claim 5 , wherein the C-ring member is made of a heat conductive material to enhance heat transfer between the support tray sidewall assembly and the interior sidewall of the vessel body.
7. The vapor delivery vessel of claim 1 wherein the circumferential sidewall assembly is outwardly expandable with a screw mechanism adapted to direct an outward force to the circumferential sidewall assembly to increase surface area contact with the vessel body interior sidewall, the screw mechanism further adapted to maintain the circumferential sidewall assembly in an expanded configuration.
8. A vapor delivery vessel assembly for vaporizing and delivering vaporized source material, the vessel assembly comprising:
a vessel body having an interior volume defined by a base and a sidewall, the sidewall defining an interior diameter of the vessel body and having an interior sidewall surface;
a gas inlet and a gas outlet arranged in fluid communication with the interior volume of the vessel body, the gas inlet being adapted to supply a first gas to the interior volume of the vessel body;
a first vented support tray disposed within the interior volume and adjacent the sidewall or interior wall of the vessel body, the support tray adapted to support on a first surface a vaporizable source material in the flow path extending between the gas inlet and the gas outlet; and
a heat transfer assembly disposed on the first support tray and located between the vessel body sidewall and the first support tray, the heat transfer assembly supported at least partially by the first surface of the support tray within the interior volume of the vessel body wherein
the heat transfer assembly includes a circumferential sidewall assembly that extends upwards from and is in contact with the support tray, the sidewall assembly adapted to expand radially out towards the sidewall of the vessel body to increase surface area physical contact between the support tray and the interior sidewall surface of the vessel body; or
the heat transfer assembly includes a sidewall assembly that includes a section that is partially expandable radially out towards the sidewall of the vessel body to shift the support tray within the interior vessel volume to increase surface area physical contact between the support tray and the interior sidewall surface of the vessel body.
9. The vapor delivery vessel assembly of claim 8 , further comprising
a heat transfer assembly disposed between the vessel sidewall and the first support tray supported at least partially by the first surface of the support tray within the interior volume of the vessel, the heat transfer assembly further adapted to support a second support tray within the vessel.
10. The vapor delivery vessel of claim 8 , wherein the circumferential sidewall assembly is outwardly expandable with a screw mechanism adapted to direct an outward force to the circumferential sidewall assembly to increase surface area contact with the vessel body interior sidewall, the screw mechanism further adapted to maintain the sidewall assembly in an expanded configuration.
11. The vapor delivery vessel assembly of claim 8 , wherein the sidewall assembly of the support tray is compressible and the sidewall assembly includes a release, the support tray sidewall extending radially out towards the vessel body sidewall to increase surface area physical contact between the support tray and/or the vaporizable material and the interior sidewall surface of the vessel body, the release actuatable for removing compressed support tray from the vessel body.