Patent ID: 6830625
Filing Date: 2004-12-14
Classification: H01L

Abstract:
A system for processing wafers comprising:a transfer chamber having a transfer arm; a bake chamber coupled to said transfer chamber, said bake chamber configured to bake a wafer; an undoped epi chamber coupled to said transfer chamber, said undoped epi chamber configured to grow an undoped base layer over said wafer; a doped epi chamber coupled to said transfer chamber, said doped epi chamber configured to grow a doped base layer over said wafer; said undoped epi chamber being situated between said bake chamber and said doped epi chamber, whereby said system for processing wafers is configured to cause said transfer arm to proceed in sequence from said bake chamber to said undoped epi chamber and to said doped epi chamber when processing said wafer; wherein said transfer arm is configured to place said wafer in said bake chamber for baking, to place said wafer from said bake chamber to said undoped epi chamber for growing said undoped base layer, and to place said wafer from said undoped epi chamber to said doped epi chamber for growing said doped base layer.