Chemical-mechanical polishing 2001: advantages and future challenges : symposium held April 18-20, 2001, San Francisco, California, U.S.A.

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Materials Research Society, Dec 14, 2001 - Science - 304 pages
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With copper and barrier-layer integration firmly in place, several other exciting developments are occurring in the practice of chemical-mechanical polishing (CMP), and many of the recent advances are described in this volume. Discussions on CMP for shallow-trench isolation, abrasive-free slurries, improvements in pad and tool configurations including fixed abrasive pads, "engineered" particles, effects of nanotopography, end-point studies, defect characterization and novel post-CMP cleaning methods are highlighted. Considerable progress has also been reported in modeling the complicated interactions that occur between the wafer surface and the pad and the slurry, whether containing abrasives or abrasive-free, and their influence on dishing and erosion and nonuniformity. These studies have progressed sufficiently to offer valuable insights for process improvements. Yet many challenges, primarily arising from the integration of low-k dielectrics and the introduction of 300mm wafers, remain and will provide a high level of interest for future volumes. Specifically, low-k films pose severe constraints on the "conventional" CMP process and require new approaches. Demands for continued defect minimization and for improvements in uniformity, both WIW and WTW, and dishing and erosion are more pressing with the introduction of 300mm wafers. Finally consumable costs remain high from the end user's point of view and will need to be addressed.

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Preface xi
Why Abrasive Free Cu Slurry is Promising Ml 3
Rotational Averaging of Material Removal During CMP M1 4

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