Selective laser processing of ink-jet printed nano-scaled tin-clad copper particles

Kam Chuen Yung, T. S. Plura

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)

Abstract

The deposition of tin-clad nano-size copper particles was carried out by means of ink-jet printing. Curing the particles on Polyimide (PI) turned them into soldered structures using an Nd-YAG laser. Area coverage of 55% was achieved for a single-layer print. Subsequent laser sintering increased this value to 95%. A Butanol-based copper ink and an aqueous tin (Sn)-clad Copper (Cu) ink were produced and were ink-jetted in this work. These nano-metallic inks showed excellent suspension stability with particle weight concentrations as high as 5%. The ink components were examined by measuring the particle size distribution in a dispersed condition, and the melting temperature. A piezo ink-jet print head was used to deposit the inks onto a moveable substrate. The thermal effect of the laser irradiation allowed approaching and connecting adjacent particles by melting the particle's tin coating. The results were examined with regard to structure and soldering properties using EDX, SEM and optical microscopy.
Original languageEnglish
Pages (from-to)393-397
Number of pages5
JournalApplied Physics A: Materials Science and Processing
Volume101
Issue number2
DOIs
Publication statusPublished - 1 Nov 2010

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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