Patent ID: 6071350
Filing Date: 2000-06-06
Classification: C23C,H01J,H01L,Y10S

Abstract:
An apparatus for manufacturing a semiconductor, said apparatus comprising:a process chamber for fabricating a semiconductor device therein;a plurality of load lock chambers adapted for communicating with predetermined portions of said process chamber, and adapted for loading semiconductor wafers to be transferred to within said process chamber;a pump adapted for reducing the pressure of said plurality of load lock chambers;an exhaust pipe connecting said load lock chambers with said pump, and adapted for exhausting gas of said load lock chambers, said exhaust pipe comprising a main pipe and a plurality of sub-pipes, wherein each sub-pipe has a first end connected to one of said plurality of load lock chambers, and a second end connected to said main pipe, and said main pipe has a first portion having a first diameter and a second portion having a second diameter larger than said first diameter, said first portion comprising an unbranched section of the main pipe extending from a point where the main pipe branches to connect to said plurality of sub-pipes, and the second portion comprising an unbranched section of the main pipe extending from the first section to a point where the main pipe connects to said pump; anda valve installed in a predetermined portion of said exhaust pipe.