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. 1994 Sep-Oct;99(5):641–671. doi: 10.6028/jres.099.059

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The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.

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Fig. 9 — Low accelerating voltage (1.0 kV), high resolution image using an instrument with extended field technology the sample is “grass” on a silicon wafer, (a) Lower magnification image taken at 50 000 × and (b) higher magnification image taken at 100 000 ×. (Courtesy of Hitachi Scientific Instruments.)