Patent ID: 11872516
Assignee: MILAEBO CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. An apparatus for trapping of a reaction by-product with an extended available collection area, which is configured to accommodate gas, which is discharged after a deposition process during a semiconductor manufacturing process, in a housing (1), heat the gas with a heater (2), trap a reaction by-product contained in the gas by using an internal trapping tower (3), and discharge only the gas,
wherein the internal trapping tower (3) is configured to trap, in multiple stages, the reaction by-product according to a height, the internal trapping tower (3) including separately: an upper end trapping unit (31) configured to perform a trapping reaction while guiding and lowering a main flow of the gas to a central portion; an intermediate trapping unit (32) in which an inner region is formed as a reversed trapezoidal space portion so as to accommodate the introduced gas and trap the reaction by-product; a lower end trapping unit (33) configured to prevent a leak of the trapped reaction by-product to a gas discharge port (13a) of the housing while trapping, in multiple stages, the reaction by-product from the gas introduced through a lateral side; and a trapping cover (34) configured to prevent an external leak by trapping the reaction by-product in a porous powder form trapped in the inner and outer regions of the intermediate trapping unit,
wherein the intermediate trapping unit (32) is configured such that depending on a change in trapping amount according to an elapse of a use duration time, a main flow of the gas is guided so that the gas flows toward an outer region after flowing downward to an inner region of planar cross-shaped vertical plates (321) forming a periphery during a former part of the use duration time, and the gas is guided to flow downward after flowing to the outer region of the planar cross-shaped vertical plates (321) from an upper side of the inner region during a latter part of the use duration time when the trapped reaction by-product is accumulated in the inner region, such that an additional trapping reaction is performed, and
wherein the trapping cover (34) has a cylindrical structure in which a plurality of gas holes (341) is arranged on a surface, and is spaced apart from the lower portion of the intermediate trapping unit (32) at a predetermined interval to be installed in a vertical direction on the lower end trapping unit (33) along the periphery.