Patent ID: 11866844
Assignee: GLOBALWAFERS CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 15:
16. A method for doping a single crystal silicon ingot pulled from a silicon melt held within a crucible positioned within an ingot puller apparatus, the ingot puller apparatus includes a housing, a dopant injector extending into the housing, and a heating system positioned with the housing, the dopant injector including a feed tube positioned within the housing and a vaporization cup positioned within the feed tube and the housing, the method comprising:
heating the vaporization cup using the heating system;
injecting liquid dopant into the feed tube and the vaporization cup;
vaporizing the liquid dopant into vaporized dopant within the feed tube, wherein the liquid dopant is vaporized by flash evaporation by heating the liquid dopant with the vaporization cup at a pressure that is below atmospheric pressure; and
channeling the vaporized dopant towards the silicon melt using the feed tube.