INK JET PROCESSING OF METALLIC NANOPARTICLE SUSPENSIONS FOR ELECTRONIC CIRCUITRY FABRICATION

A solution-processable approach in creating gold circuit electrodes with features as fine as 100 μm is demonstrated, using a piezoelectrically driven printhead to deposit metallic nanoparticle suspensions. The suspensions consist of gold particles ranging 5–20 nm in diameter suspended in a toluene solvent. The amount of gold nanoparticles present in the suspensions ranges between 30 to 50% by weight. Inductor and capacitor electrode patterns are deposited onto a glass substrate and thermally processed to drive off the solvent and allow the nanoparticles to coalesce/sinter, thereby yielding a conductive path with an electrical resistivity of O(10−7) Ωm.

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