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Preclean is a critical process step in Cu metallization to ensure device reliability. For the integration of ultra low k (kles2.5) dielectrics, an advanced preclean (APC) technology has been developed and characterized using PECVD SiOCH (k=2.5) dielectrics. With the optimal hardware and process, this technology minimizes plasma damage, causing no measurable k increase and having the lowest impact...
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