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  • ASTM
    E986-04(2024) Standard Practice for Scanning Electron Microscope Beam Size Characterization
    Edition: 2024
    $76.13
    Unlimited Users per year

Description of ASTM-E986 2024

ASTM E986-04-Reapproved2024

Active Standard: Standard Practice for Scanning Electron Microscope Beam Size Characterization




ASTM E986

Scope

1.1 This practice provides a reproducible means by which one aspect of the performance of a scanning electron microscope (SEM) may be characterized. The resolution of an SEM depends on many factors, some of which are electron beam voltage and current, lens aberrations, contrast in the specimen, and operator-instrument-material interaction. However, the resolution for any set of conditions is limited by the size of the electron beam. This size can be quantified through the measurement of an effective apparent edge sharpness for a number of materials, two of which are suggested. This practice requires an SEM with the capability to perform line-scan traces, for example, Y-deflection waveform generation, for the suggested materials. The range of SEM magnification at which this practice is of utility is from 1000 × to 50 000 × . Higher magnifications may be attempted, but difficulty in making precise measurements can be expected.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


Keywords

electron beam size; E766; graphite fiber; magnification; NIST–SRM 2069B; resolution; SEM; SEM performance; spot size; waveform ;


ICS Code

ICS Number Code 31.120 (Electronic display devices)


DOI: 10.1520/E0986-04R24

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