An investigation of tool wear in the dam-bar cutting of integrated circuit packages

Chi Fai Cheung, Wing Bun Lee, W. M. Chiu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

32 Citations (Scopus)


Dam-bar cutting is a mechanical trimming process in which the dam-bar between the leads of an integrated circuit (IC) package after post-molding process and deflashing is pieced out. Premature wear of the dam-bar cutting tool leads to higher operating costs and loss of production. In this paper, an investigation has been made to study the effects of punch-die clearance, leadframe materials, tool materials, tool coatings, punch shear and cutting speed on the wear of dam-bar cutting tools. The relationships between the punch flank wear, burr height and the dam-bar cutting force are also explored. Hence, critical factors are determined to optimize the tool life and improve the quality of the dam-bar cutting process.
Original languageEnglish
Pages (from-to)274-282
Number of pages9
Issue number2
Publication statusPublished - 1 Feb 2000


  • Cutting force
  • Dam-bar cutting
  • Integrated circuit package
  • Tool wear

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


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