Patent ID: 11862490
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC H  F | IPC F  H

Claim 0:
1. A diffusion furnace, comprising:
a furnace tube structure comprising a furnace tube body and a furnace bottom, a bottom of the furnace tube body being connected to the furnace bottom to form a reaction chamber; and
a carrying structure comprising a pedestal and a plurality of cassettes disposed on the pedestal, the pedestal being disposed on the furnace bottom,
wherein the furnace tube structure further comprises a gas path system configured to supply reactive gas to the reaction chamber, and the gas path system comprises a gas intake structure and an exhaust structure, both of which are disposed on the furnace tube body and communicated with the reaction chamber,
wherein the gas intake structure comprises a gas intake tube, and the exhaust structure comprises an exhaust port; the gas path system further comprises vertical tubes communicated with the gas intake tube; the gas intake tube is disposed close to the bottom of the furnace tube body, and the exhaust port is disposed at the top of the furnace tube body; and the vertical tube is provided with a plurality of blowholes distributed at intervals along a vertical direction of the vertical tube, so that the reactive gas in the vertical tube can be blown to gaps between wafers spaced in a vertical direction.