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Easter Bonnet
Qiangfei Xia GS
Department of Electrical Engineering
A laser pulse melted a tiny piece of metal on a silicon chip, resulting in an unexpected shape that looks like a very, very small Easter bonnet. An unintended dust particle serves as a decorative flower on its top. The size of the bonnet in this photo, measured from left to right, is about 45 micrometers, half the diameter of a human hair.