Size reduction is one of the main driving forces for packaging in nearly al
l electronic applications, The interaction of size reduction with highest f
unctionality and high reliability is also predominant for all microelectron
ic systems. Therefore a synergism of optimal product design, smallest singl
e chip package and board technology will give the best solution. Wafer leve
l CSP will be the best solution for single chip packaging matching all requ
irements for electronic systems and reducing total cost.