Patent ID: 7329322
Filing Date: 2008-02-12
Classification: F16K,H01L,Y10T

Abstract:
1. A method for manufacturing a semiconductor device utilizing a semiconductor device manufacturing system including a wafer processing apparatus and an exhaust apparatus, said exhaust apparatus is equipped with at least one exhaust pipe, which is connected to said wafer processing apparatus, and an exhaust pressure adjusting unit for adjusting an opening area of said exhaust pipe variably, said exhaust pressure adjusting unit including: a switching valve, provided in said exhaust pipe such that said switching valve can be rotated freely, for varying an opening area of said exhaust pipe; a rotating shaft, extending from inside to outside of said exhaust pipe, for rotating said switching valve fixed thereon; a shaft support provided in said exhaust pipe for supporting said rotating shaft so that said rotating shaft can be rotated freely; and gas introduction means having a communicating pass connecting a gap between said shaft support and said rotating shaft to the exterior of said exhaust pipe, and for introducing purge gas into said gap via said communicating pass, the method comprising: a step (a) for cleaning a wafer with chemicals in said wafer processing apparatus; a step (b) for rinsing said wafer with water after completion of said step (a); and a step (c) for drying said wafer in said wafer processing apparatus after completion of said step (b), wherein said step (a) includes a sub-step of introducing purge gas into said gap between said shaft support and said rotating shaft using said exhaust pressure adjusting unit.