JSME International Journal Series A Solid Mechanics and Material Engineering
Online ISSN : 1347-5363
Print ISSN : 1344-7912
ISSN-L : 1344-7912
PAPERS
Tensile Straightening of Superfine Wire and Residual Stress Measurement Using Focused Ion Beam
Tsutomu YAMASHITAKazunari YOSHIDA
Author information
JOURNALS FREE ACCESS

2005 Volume 48 Issue 4 Pages 322-328

Details
Abstract

The general method of reducing curving or bending for midsize wires or sheets is straightening using rollers and/or levelers. For superfine wires, similarly, high straightness is needed. However, it is very difficult to deal with superfine wires due to their fineness and low tensile strength. In our study, warm tensile straightening processes for superfine gold wire, which is widely used as bonding material between leads and IC chips in semiconductors, were examined. Furthermore, finite element analyses of drawing and tensile straightening of superfine wires were carried out. The correlation between straightness and axial residual stress, which was calculated using the curve width when half of the wire was removed by sputtering with a focused ion beam (FIB), was studied. As a result of our studies, the improvement of straightness by tensile straightening of superfine gold wire was demonstrated, and the relationship between axial residual stress and straightness of wires was clarified.

Information related to the author
© 2005 by The Japan Society of Mechanical Engineers
Previous article Next article
feedback
Top