Patent ID: 9201112
Filing Date: 2015-12-01
Classification: G01N,G01Q,G01R,H01J,H01L

Abstract:
1. A method for atom probe tomography (APT) sample preparation from a three-dimensional (3D) field effect transistor device formed within a semiconductor structure, the method comprising: measuring a capacitance-voltage (C-V) characteristic for the 3D field effect transistor device; identifying, based on the measured capacitance-voltage (C-V) characteristic, a Fin structure corresponding to the 3D field effect transistor device; detaching the identified Fin structure from the 3D field effect transistor device using a nanomanipulator probe tip; welding the detached Fin to the nanomanipulator probe tip using an incident focused ion beam having a voltage of less than about 1000 eV; and applying the incident focused ion beam having a voltage of less than about 1000 eV to a tip of the Fin that is welded to the nanomanipulator probe tip, wherein the tip of the Fin is sharpened by the focused ion beam.