Non-destructive imaging of buried electronic interfaces using a decelerated scanning electron beam

Atsufumi Hirohata (), Yasuaki Yamamoto, Benedict A. Murphy and Andrew J. Vick
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Atsufumi Hirohata: University of York
Yasuaki Yamamoto: SM Business Unit, JEOL, Musashino 3-1-2, Akishima
Benedict A. Murphy: University of York
Andrew J. Vick: University of York

Nature Communications, 2016, vol. 7, issue 1, 1-6

Abstract: Abstract Recent progress in nanotechnology enables the production of atomically abrupt interfaces in multilayered junctions, allowing for an increase in the number of transistors in a processor. However, uniform electron transport has not yet been achieved across the entire interfacial area in junctions due to the existence of local defects, causing local heating and reduction in transport efficiency. To date, junction uniformity has been predominantly assessed by cross-sectional transmission electron microscopy, which requires slicing and milling processes that can potentially introduce additional damage and deformation. It is therefore essential to develop an alternative non-destructive method. Here we show a non-destructive technique using scanning electron microscopy to map buried junction properties. By controlling the electron-beam energy, we demonstrate the contrast imaging of local junction resistances at a controlled depth. This technique can be applied to any buried junctions, from conventional semiconductor and metal devices to organic devices.

Date: 2016
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DOI: 10.1038/ncomms12701

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