Material interface detection based on secondary electron images for focused ion beam machining

Hang Eun Joe, Won Sup Lee, Martin B. G Jun, No Cheol Park, Byung Kwon Min

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A method for interface detection is proposed for focused ion beam (FIB) processes of multilayered targets. As multilayers have emerged as promising structures for nanodevices, the FIB machining of multilayers has become a challenging issue. We proposed material interface detection by monitoring secondary electron (SE) images captured during the FIB process. The average of the gray-levels and the skewness coefficient of gray-level histograms of the SE images were evaluated to recognize endpoints for the FIB processes. The FIB process control with the proposed method was demonstrated by fabricating the nanostructures on the multilayered target without thickness information. It was also demonstrated on a curved surface. Grooves with a desired depth into the target and an aperture as an opening window were precisely fabricated by the FIB process control. The proposed strategy of the FIB process can be used for complex substrates such as curved or flexible targets.

Original languageEnglish
Pages (from-to)37-43
Number of pages7
JournalUltramicroscopy
Volume184
DOIs
Publication statusPublished - 2018 Jan

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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