Surfactant mediated slurry formulations for Ge CMP applications

G. Bahar Basim, Ayşe Karagöz, Long Chen, Ivan Uriev Vakarelski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, slurry formulations in the presence of self-assembled surfactant structures were investigated for Ge/SiO2 CMP applications in the absence and presence of oxidizers. Both anionic (sodium dodecyl sulfate-SDS) and cationic (cetyl trimethyl ammonium bromide-C12TAB) micelles were used in the slurry formulations as a function of pH and oxidizer concentration. CMP performances of Ge and SiO2 wafers were evaluated in terms of material removal rates, selectivity and surface quality. The material removal rate responses were also assessed through AFM wear rate tests to obtain a faster response for preliminary analyses. The surfactant adsorption characteristics were studied through surface wettability responses of the Ge and SiO2 wafers through contact angle measurements. It was observed that the self-assembled surfactant structures can help obtain selectivity on the silica/germanium system at low concentrations of the oxidizer in the slurry. © 2013 Materials Research Society.
Original languageEnglish (US)
Title of host publicationMRS Proceedings
PublisherCambridge University Press (CUP)
Pages73-78
Number of pages6
ISBN (Print)9781632661425
DOIs
StatePublished - Aug 13 2013

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