Fabrication, electrical characterization and reliability study of partially electroplated tapered copper through-silicon vias

Pradeep Dixit, Heikki Viljanen, Jaakko Salonen, Jyrki Molarius, Philippe Monnoyer

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    3 Citations (Scopus)

    Abstract

    The fabrication, electrical characterization and reliability study of copper through-silicon via (TSV) is reported. All the fabrication steps needed in this process have a process temperature = 250°C. The copper TSVs have two distinct features: tapered via profile and partial filling of the vias. Besides the single Kelvin cell TSVs, daisy chains having up to 1400 TSVs were also fabricated and characterized. The measured electrical resistance of a single Kelvin TSV was between 3-10 MO. Later, these partially filled TSVs were subjected to various thermal and electrical cycling tests to study their behavior under different stress conditions. Electrical resistance of these TSVs was found to be stable under these tests; however certain TSV failure were also observed. Preliminary study has shown that via etching and via-filling related defects were the main reasons behind these failures. These cost-effective TSVs were implemented in the wafer level capping of MEMS resonators
    Original languageEnglish
    Title of host publication8th International Microsystems, Packaging, Assembly and Circuits Technology Conference, IMPACT 2013
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Pages190-193
    ISBN (Print)978-1-4799-0667-3
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA4 Article in a conference publication
    Event8th International Microsystems, Packaging, Assembly and Circuits Technology Conference - Green and Cloud: Creating Value and Toward Eco-Life, IMPACT 2013 - Taipei, Taiwan, Province of China
    Duration: 22 Oct 201325 Oct 2013

    Conference

    Conference8th International Microsystems, Packaging, Assembly and Circuits Technology Conference - Green and Cloud: Creating Value and Toward Eco-Life, IMPACT 2013
    Abbreviated titleIMPACT 2013
    Country/TerritoryTaiwan, Province of China
    CityTaipei
    Period22/10/1325/10/13

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