Method for plasma etching a dielectric layer

Semiconductor device manufacturing: process – Chemical etching – Combined with coating step

Reexamination Certificate

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C438S706000, C438S723000

Reexamination Certificate

active

07056830

ABSTRACT:
A method of etching a dielectric layer formed on a substrate including a sequence of processing cycles, wherein each cycle comprises steps of depositing an inactive polymeric film, activating the film to etch the structure, and removing the film is disclosed. In one embodiment, the method uses a fluorocarbon gas to form the polymeric film and a substrate bias to activate such film.

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