Patent ID: 6037272
Filing Date: 2000-03-14
Classification: C23C,Y10S

Abstract:
A method for fabricating a semiconductor device using an apparatus for low pressure chemical vapor deposition, the method comprising:loading wafers sequentially into a first group of reaction chambers;pumping a designated one of said reaction chambers to a high vacuum using a second group of high-vacuum pumps connected to said reaction chambers wherein each high-vacuum pump of said second group being connected to a single reaction chamber of said first group;opening one gate valve of a third group of gate valves, wherein said third group having the same number of members as said first group and said third group having fewer members than said second group, and wherein each gate valve of said third group communicating with a corresponding reaction chamber of said first group through those of said high-vacuum pumps which are connected to said corresponding reaction chamber, and wherein said opened gate valve communicates with the designated reaction chamber which is to receive a reaction gas;pumping the designated reaction chamber to a low vacuum using a low-vacuum pump being connected to said gate valves;injecting said reaction gas into said designated reaction chamber at a start time and for a duration;closing said opened gate valve;ceasing pumping to low vacuum all of said gate valves of said third group are closed; andrepeating said opening, said pumping to low vacuum, said injecting, said closing, and said ceasing steps for other of said reaction chambers in a sequence.