Rapid fabrication of gold microsphere arrays with stable deep-pressing anisotropic conductivity for advanced packaging.

ABSTRACT: Smooth metal microspheres with uniform sizes are ideal for constructing particle-arrayed anisotropic conductive films (ACF), but synthesis is hindered by challenges in controlling anisotropic metal growth. Here, we present a positioned transient-emulsion self-assembly and laser-irradiation strategy to fabricate pure gold microsphere arrays with smooth surfaces and uniform sizes. The fabrication involves assembling gold nanoparticles into uniform colloidosomes within a pre-designed microhole array, followed by rapid transformation into well-defined microspheres through laser heating. The gold nanoparticles melt and merge in a layer-by-layer manner due to the finite skin depth of the laser, leading to a localized photothermal effect. This strategy circumvents anisotropic growth, enables tuna

SUBMITTER: Cao A 

PROVIDER: S-EPMC11502786 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature