Patent ID: 8008174
Filing Date: 2011-08-30
Classification: C23C,C30B,H01L

Abstract:
1. A method for forming a multi-layered material, comprising: advancing a plurality of wafers through a deposition system, wherein the deposition system comprises a first deposition zone, a second deposition zone, a third deposition zone, and a fourth deposition zone; depositing a buffer layer on a first wafer within the first deposition zone; depositing a sacrificial layer on the first wafer within the second deposition zone, while depositing the buffer layer on a second wafer within the first deposition zone; depositing a passivation layer on the first wafer within the third deposition zone, while depositing the sacrificial layer on the second wafer within the second deposition zone, and while depositing the buffer layer on a third wafer within the first deposition zone; and depositing a gallium arsenide active layer on the first wafer within the fourth deposition zone by an epitaxial process, while depositing the passivation layer on the second wafer within the third deposition zone, while depositing the sacrificial layer on the third wafer within the second deposition zone, and while depositing the buffer layer on a fourth wafer within the first deposition zone.