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The aim of this paper is to investigate the relationship between mechanical stress and a new conduction mechanism discovered recently, that is conduction through fast charge pulses in insulting polymers. Theories and experimental data suggested that such pulses constitute charge solitons moving in the insulation bulk thanks to the induced compressive force applied to the natural relaxation of the...
The separation of golden ball and die pad due to the poor bonding strength of 1st ball solder joint is the main failure mode in thermo-sonic ball wire bonding. In this paper, nonlinear elastic and elasto-plastic quasi-static analysis of FAB (free air ball) in ultrasonic vibration process is carried out by finite element method with ANSYS. We study the evolution way of compressive stress distributions...
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