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US08500951B2 Low-K damage avoidance during bevel etch processing 有权
斜角蚀刻加工期间的低K损伤避免

Low-K damage avoidance during bevel etch processing
Abstract:
A method for etching a bevel edge of a substrate is provided. A patterned photoresist mask is formed over the etch layer. The bevel edge is cleaned comprising providing a cleaning gas comprising at least one of a CO2, CO, CxHy, H2, NH3, CxHyFz and a combination thereof, forming a cleaning plasma from the cleaning gas, and exposing the bevel edge to the cleaning plasma. Features are etched into the etch layer through the photoresist features and the photoresist mask is removed.
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