Silver pick up during tail formation in thermosonic wire bonding process

Lee, Jae-sik; Mayer, Michael; Zhou, Yunhong; Hong, S. J.; Moon, J.T.

doi:10.1016/j.microrel.2010.06.007

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…Ultrasonic friction energy is necessary in order for Ag material pick up to occur. The hardness of the free-air ball (FAB) with Ag pick up is reduced by up to 4% compared to that of a FAB made from a tail broken at the neck of a ball bond and therefore having no Ag pick up [7]. Parameters should be controlled so as to increase the ratio of the strain at the bonding interface to the strain on the bump [8].…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Heating System in Thermosonic Bonding Process

Zhang

Fang

et al. 2013

AMM

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A constant temperature range of the heating system plays an important role in the thermosonic bonding process. Heating block will provide enough heat for the heating system. In the paper, the thermal model of heating block and heating system were calculated by finite element method, and then some important conclusions were obtained. The change of temperature and thermal stress of block with the reference value of x and y was obtained. And an optimal structure of block for right temperature was built. The temperature distribution, thermal displacement and thermal stress distribution of the heating block and heating system were disclosed. The relevant change trends of temperature and thermal stress under the different load of temperature were investigated. These results can help improve the reliability of the heating system used in the thermosonic bonding process.

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Section: Introductionmentioning

confidence: 99%