Optimization of process parameters for preparing honodisperse particles by pulsated orifice injection method

Mineo Asano, Naoki Nagai, Akira Kawasaki, Ryuzo Watanabe

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Monosized spherical powders of Pb-Sn alloy were prepared by pulsated orifice injection method (POIM). The apparatus was devised for injecting molten metal from a small orifice by a clipping action of a pressure transmitting diaphragm driven by a piezoelectric actuater. Each pulse pressure, induced by the displacement of the diaphragm, produced one liquid droplet having a size almost equal to the orifice diameter. The effect of the process parameters of waveform, characterized as rise time, hold time and fall time, on the particle formation and size scattering has been discussed. The shape of the obtained particles is spherical with smooth surface covered with very thin layer of SnO2 which is less than 10 Ȧ as detected by auger electron spectrocopy.

Original languageEnglish
Pages (from-to)1273-1278
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume43
Issue number11
DOIs
Publication statusPublished - 1996 Nov

Keywords

  • Flip chip bonding
  • Monosized spherical particle
  • Pulsated orifice injection method
  • Solder alloy

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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