The EM 400 introduced in 1975 used a LAB6 electron gun, which was ten times as bright as the standard tungsten filament at the time. On the down side, the reactivity of lanthanum hexaboride required an ultra-clean vacuum system of 10-6 Torr.

Thermo Fisher Scientific Inc. (NYSE: TMO), the world leader in serving science, today announced that it has completed its acquisition of FEI Company, Inc. (NASDAQ: FEIC), the leader in high-performance electron microscopy. FEI and Philips joined their technologies in 1993 to create the first DualBeam (FIB/SEM) workstation.

EM-400

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