发明授权
US06221726B1 Process for fabricating device structures for real-time process control of silicon doping 失效
用于制造用于硅掺杂的实时过程控制的器件结构的工艺

  • 专利标题: Process for fabricating device structures for real-time process control of silicon doping
  • 专利标题(中): 用于制造用于硅掺杂的实时过程控制的器件结构的工艺
  • 申请号: US08548928
    申请日: 1995-10-26
  • 公开(公告)号: US06221726B1
    公开(公告)日: 2001-04-24
  • 发明人: Kurt H. Weiner
  • 申请人: Kurt H. Weiner
  • 主分类号: H01L21336
  • IPC分类号: H01L21336
Process for fabricating device structures for real-time process control of silicon doping
摘要:
Silicon device structures designed to allow measurement of important doping process parameters immediately after the doping step has occurred. The test structures are processed through contact formation using standard semiconductor fabrication techniques. After the contacts have been formed, the structures are covered by an oxide layer and an aluminum layer. The aluminum layer is then patterned to expose the contact pads and selected regions of the silicon to be doped. Doping is then performed, and the whole structure is annealed with a pulsed excimer laser. But laser annealing, unlike standard annealing techniques, does not effect the aluminum contacts because the laser light is reflected by the aluminum. Once the annealing process is complete, the structures can be probed, using standard techniques, to ascertain data about the doping step. Analysis of the data can be used to determine probable yield reductions due to improper execution of the doping step and thus provide real-time feedback during integrated circuit fabrication.
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