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Solder Paste and Flux Technology

  • Koki Solder America Inc.

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

4 Scopus citations

Abstract

In the world of electronics materials, solder paste occupies a relatively small volume, yet it plays a critical role in electronics manufacturing/packaging. This chapter introduces the state of the art of lead-free solder paste technology, including the materials, the process, the reliability, and the challenges encountered. Five common ingredients constitute a standard solder paste: a solder alloy, a flux, an activator, a viscosity modifier, and a solvent. Two types of solder paste are reviewed in the chapter: Water-Soluble Solder Paste and No-Clean Solder Paste. The chapter discusses the characteristics of a solder paste, focusing on printing, reflow, in-circuit test probe testability, and flux reliability. It explores the relation between powder size and oxidation level of the solder powder.

Original languageEnglish
Title of host publicationLead-free Soldering Process Development and Reliability
PublisherJohn Wiley and Sons Inc.
Pages73-93
Number of pages21
ISBN (Electronic)9781119482093
ISBN (Print)9781119482031
DOIs
StatePublished - Jan 1 2020

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