An apparatus and method for inspecting a surface of a sample, particularly but
not limited to a semiconductor device, using an electron beam is presented. The
technique is called Secondary Electron Emission Microscopy (SEEM), and has significant
advantages over both Scanning Electron Microscopy (SEM) and Low Energy Electron
Microscopy (LEEM) techniques. In particular, the SEEM technique utilizes a beam
of relatively high-energy primary electrons having a beam width appropriate for
parallel, multi-pixel imaging. The electron energy is near a charge-stable condition
to achieve faster imaging than was previously attainable with SEM, and charge neutrality
unattainable with LEEM. The emitted electrons may be detected using a time delay
integration detector.