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Semiconductor integrated circuit arrangement fabrication method










Image Number 2 for United States Patent #5874013.

To realize etching with a high selection ratio and a high accuracy in fabrication of an LSI, the composition of dissociated species of a reaction gas is accurately controlled when dry-etching a thin film on a semiconductor substrate by causing an inert gas excited to a metastable state in a plasma and a flon gas to interact with each other, and selectively obtaining desired dissociated species.








 
 
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