  Beta-tin has been used widely as an interconnect in modern electronics. To
improve the understanding of the reliability of these components, we directly
measure the critical resolved shear stress of individual slip systems in
beta-tin using micropillar compression tests at room temperature with crystal
orientations near-[100] and [001] in the loading direction within a large grain
high purity tin (99.99%) sample. This activates the (110)[1-11]/2,
(110)[1-1-1]/2, (010)[001] and (110)[001] slip systems. Analysis of the slip
traces and load-displacement curves enables measurement of the critical
resolved shear stress for epsilon=10^(-4) of
tau_(CRSS)^({110}<1-11>/2)=10.4+/-0.4 and tau_(CRSS)^({010}<001>)=3.9+/-0.3
MPa.
