Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27122
Title: An investigation of tool wear in the dam-bar cutting of integrated circuit packages
Authors: Cheung, CF 
Lee, WB 
Chiu, WM
Keywords: Cutting force
Dam-bar cutting
Integrated circuit package
Tool wear
Issue Date: 2000
Publisher: Elsevier Sequoia SA
Source: Wear, 2000, v. 237, no. 2, p. 274-282 How to cite?
Journal: Wear 
Abstract: 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.
URI: http://hdl.handle.net/10397/27122
ISSN: 0043-1648
DOI: 10.1016/S0043-1648(99)00350-6
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