| 摘要 |
A method of manufacturing a semiconductor device includes forming a first level, forming a first barrier layer over the first level, forming a dielectric layer over the first barrier layer, forming an opening through the dielectric layer, etching the first barrier layer, and filling the opening with metal to form a first metal feature. The first barrier level is etched using CHF3 and CH3F. Additionally, the first barrier layer can be formed from silicon nitride.
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