Through silicon vias filled with planarized carbon nanotube bundles

Teng Wang, Kjell Jeppson, Niklas Olofsson, Eleanor E.B. Campbell, Johan Liu

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

The feasibility of using carbon nanotube (CNT) bundles as the fillers of through silicon vias (TSVs) has been demonstrated. CNT bundles are synthesized directly inside TSVs by thermal chemical vapor deposition (TCVD). The growth of CNTs in vias is found to be highly dependent on the geometric dimensions and arrangement patterns of the vias at atmospheric pressure. The CNT-Si structure is planarized by a combined lapping and polishing process to achieve both a high removal rate and a fine surface finish. Electrical tests of the CNT TSVs have been performed and their electrical resistance was found to be in the few hundred ohms range. The reasons for the high electrical resistance have been discussed and possible methods to decrease the electrical resistance have been proposed.

Original languageEnglish
Article number485203
JournalNanotechnology
Volume20
Issue number48
DOIs
StatePublished - 2009

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