Patent ID: 11872515
Assignee: MILAEBO CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. An apparatus for trapping of a reaction by-product contained in a gas which is discharged after a deposition process during a semiconductor manufacturing process, comprising:
a housing (1) configured to accommodate the gas;
a heater (2) configured to heat the gas;
an internal trapping tower (3) configured to trap, in multiple stages, the reaction by-product according to height, the internal trapping tower (3) comprising:
an upper end trapping unit (31) configured to perform a trapping reaction while guiding a main flow of the gas to a central portion;
an intermediate trapping unit (32) having an inner region formed as a space portion so as to accommodate the gas introduced into the intermediate trapping unit and trap the reaction by-product; and
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, the upper end trapping unit (31), the intermediate trapping unit (32), and the lower end trapping unit (33) being separated provided, and

wherein the upper end trapping unit (31) includes:
a main gas hole (311) formed in a central portion of an upper surface of the upper end trapping unit (31),
auxiliary gas holes (312) arranged around the main gas hole (311),
triangular plates (313) radially arranged around the main gas hole (311) on the upper surface of the upper end trapping unit (31), wherein each triangular plate (313) traverses one or more of the auxiliary gas holes (312) and an inclination of said each triangular plate increases from the outer periphery toward the main gas hole, and
cross-shaped plates (314) disposed between the triangular plates (313) and vertically protrude, wherein each cross-shaped plate traverses one or more the auxiliary gas holes (312), and

wherein the intermediate trapping unit (32) includes a plurality of planar cross-shaped vertical plates (321) disposed to be spaced apart from one another to have gaps at predetermined intervals 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 the planar cross-shaped vertical plates (321) defining 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, whereby an additional trapping reaction is performed.