Patent ID: 7968353
Filing Date: 2011-06-28
Classification: C23C,H01L,Y02E,Y02P

Abstract:
1. A method of depositing a thin film semiconductor layer onto a flexible substrate, comprising: transporting a substrate web through a multi-zone deposition region, depositing onto the web, within a first substantially enclosed gallium indium deposition zone, a first layer of gallium indium in the presence of selenium gas, depositing onto the web, after depositing the first layer of gallium indium and within a first substantially enclosed copper deposition zone, a first layer of copper in the presence of selenium gas, depositing onto the web, after depositing the first layer of copper and within a second substantially enclosed gallium indium deposition zone, a second layer of gallium indium in the presence of selenium gas, monitoring by x-ray fluorescence a characteristic of one or more layers deposited on the web, and adjusting a deposition rate in one of the zones based on data generated from the monitoring step, wherein the monitoring step is performed before depositing the second layer of gallium indium.