Method and apparatus to help promote contact of gas with vaporized material
View Patent ↗Vaporizable material is supported within a vessel to promote contact of an introduced gas with the vaporizable material, and produce a product gas including vaporized material. A heating element supplies heat to a wall of the vessel to heat vaporizable material disposed therein. The vessel may comprise an ampoule having a removable top. Multiple containers defining multiple material support surfaces may be stacked disposed within a vessel in thermal communication with the vessel. A tube may be disposed within the vessel and coupled to a gas inlet. Filters, flow meters, and level sensors may be further provided. Product gas resulting from contact of introduced gas with vaporized material may be delivered to atomic layer deposition (ALD) or similar process equipment. At least a portion of source material including a solid may be dissolved in a solvent, followed by removal of solvent to yield source material (e.g., a metal complex) disposed within the vaporizer.
1. A vapor delivery vessel comprising:
a peripheral vessel wall bounding an interior volume;
a gas outlet arranged in fluid communication with the interior volume; and
at least one support structure disposed within the interior volume and adapted to receive vaporizable source material within the at least one support structure and to support the vaporizable solid source material within the interior volume, characterized in that the at least one support structure disposed within the interior volume comprises any of (i) a metal wool material configured to at least partially support the vaporizable source material when the vaporizable source material is poured therein, and (ii) a partially permeable material having pores configured to prevent the vaporizable source material from exiting the at least one support structure prior to being vaporized, wherein the pores in the partially permeable material include pores of a larger size toward a first end of the partially permeable material and pores of a smaller size at a second opposite end of the partially permeable material, wherein the partially permeable material is positioned to receive a flow of gas at the first end and to pass the flow of gas at the second opposite end.
2. A vapor delivery vessel comprising:
a peripheral vessel wall bounding an interior volume;
a gas outlet arranged in fluid communication with the interior volume; and
at least one support structure disposed within the interior volume and adapted to receive vaporizable source material within the at least one support structure and to support the vaporizable solid source material within the interior volume, characterized in that the at least one support structure disposed within the interior volume comprises a partially permeable material having pores configured to prevent the vaporizable source material from exiting the at least one support structure prior to being vaporized, wherein the pores in the partially permeable material include pores of a larger size toward a first end of the partially permeable material and pores of a smaller size at a second opposite end of the partially permeable material, wherein the partially permeable material is positioned to receive a flow of gas at the first end and to pass the flow of gas at the second opposite end.