FAI 150 kV Focused Ion Beam System

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The Nanofab-150 is a focused ion beam system for use with liquid metal ion sources. The machine was designed and built by FAI company.

The equipment features a 150 KV linear accelerating column with an ExB mass filter. This allows for alloy sources to be used. Currently, an Arsenic-Palladium-Boron source is being used for implanting doping elements into solid state experimental devices. Other features include an imaging system using a channel electron multiplier (CEM), an X,Y stage for precision positioning with a laser interferometer, a 6" wafer pallet with an insertion/extraction system through a load-lock, three apertures for selecting beam current while in operation, and basic pattern writing software.

The beam spot size at the focal plane is estimated to be better than 100 nanometers. Tests are underway to precisely measure the implantation profile.