Recent advances in focused ion beam (FIB) technology, towards finer fo
cus and higher current density, have made micromachining by FIB both a
n attractive ideal and a commercial reality. We demonstrate new applic
ations in micro-electro-mechanical systems (MEMS) and sensors, high-re
solution trimming of YBaCuO superconducting devices, and transmission
electron microscopy (TEM) sample preparation which rely on the precisi
on milling and high resolution imaging available from FIB.