发明授权
- 专利标题: Method for forming metal silicide by laser irradiation
- 专利标题(中): 通过激光照射形成金属硅化物的方法
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申请号: US08947381申请日: 1997-10-08
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公开(公告)号: US06316357B1公开(公告)日: 2001-11-13
- 发明人: Kang-Cheng Lin , Hong-Woei Wu
- 申请人: Kang-Cheng Lin , Hong-Woei Wu
- 主分类号: H01L2128
- IPC分类号: H01L2128
摘要:
The present invention discloses a method for forming metal silicide on an electronic structure by first depositing a metal layer on top of a silicon layer of polysilicon, single crystal silicon or amorphous silicon capable of forming a metal silicide, and then irradiating the metal layer with laser energy for a sufficient length of time such that a layer of metal silicide is formed at the metal interface with polysilicon, single crystal silicon and amorphous silicon. The unreacted metal layer on the metal silicide is then removed by a wet dipping method by selecting a suitable etchant for the metal. The present invention novel method can be applied to various metallic materials such as Ti, Co, W, Pt, Hf, Ta, Mo, Pd and Cr. The laser source utilized is a pulse Excimer laser of XeCl, ArF or XeF.
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