Laser sintering of metal nanoparticle film

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    14 Citations (Scopus)

    Abstract

    Laser sintering of Au nanoparticles on a Cu substrate was studied toward an alterna-tive to gold plating. The laser sintering by laser direct writing method required much higher laser power density in comparison with that on a glass substrate. The la-ser-induced heat accumulation method is proposed as a new laser sintering method which can be applied to a metal substrate with a high thermal diffusion coefficient such as a Cu substrate. In the sintering process, the dissipation through the Cu with a high thermal diffusion coefficient was reduced by using a thermally isolated Cu substrate, where the heat accumulation in the Cu micropattern was caused sintering of whole area by laser pulse irradiation at a small spot without laser beam scanning. The SIMS profile showed that the diffusion of the Cu atom through the gold layer was reduced remarkably by the laser sintering compared to the conventional heat treatment. The reduction of Cu diffusion into gold layer is due to the extremely short sintering time of the laser-induced heat accumulation method.

    Original languageEnglish
    Pages (from-to)199-205
    Number of pages7
    JournalJournal of Photopolymer Science and Technology
    Volume26
    Issue number2
    DOIs
    Publication statusPublished - 2013

    Keywords

    • Alternative to gold plating
    • Copper diffusion
    • Copper substrate
    • Gold plating
    • Laser direct writing
    • Laser sintering
    • Metal nanoparticle ink

    ASJC Scopus subject areas

    • Polymers and Plastics
    • Organic Chemistry
    • Materials Chemistry

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