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International Test Conference 2003 (ITC'03)
Low Contact-Force Fritting Probe Card Using Buckling Microcantilevers
Charlotte, NC, USA
September 30-October 02
ISBN: 0-7803-8107-6
Kenichi Kataoka, University of Tokyo
Toshihiro Itoh, University of Tokyo
Tadatomo Suga, University of Tokyo
We report on a new type of micromachined probe card which utilizes fritting process to make contact to Al or Cu pads with low contact force smaller than 10 mN. Microcantilevers contacting the pad surface with buckling deformation and can keep uniform contact force were designed and fabricated. Mechanical properties of the micro-cantilever was measured and a good agreement with theoretical buckling force was obtained. Fritting characteristics of the microcantilevers were measured using electrolyte condencer as the power source. It was found that current duration of several milliseconds is enough to cause fritting. The contact resistance of the probe card was measured to be less than 1 Ω with contact force of 3 mN. Using an atomic force microscopy, probe marks made on the Cu electrode were measured to be 100 nm in depth and 15 ?m in width, when the contact force was 10 mN.
Citation:
Kenichi Kataoka, Toshihiro Itoh, Tadatomo Suga, "Low Contact-Force Fritting Probe Card Using Buckling Microcantilevers," itc, pp.1008, International Test Conference 2003 (ITC'03), 2003
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