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High resolution shadowing for electron microscopy by sputter deposition.

K Adachi, K Hojou, M Katoh

    Ultramicroscopy
    |December 1, 1976
    PubMed
    Summary
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    High-resolution shadowing and film preparation were achieved using argon ion sputtering. This technique enables the creation of fine object replicas and films with sub-nanometer grain sizes.

    Area of Science:

    • Materials Science
    • Surface Science
    • Nanotechnology

    Background:

    • Ion beam sputtering is a versatile technique for surface modification and thin film deposition.
    • High-resolution imaging requires precise control over shadowing and replication processes.

    Purpose of the Study:

    • To investigate the effectiveness of argon ion sputtering for high-resolution shadowing and film preparation.
    • To achieve films with grains smaller than 1 nm and high-resolution carbon replicas.

    Main Methods:

    • Utilizing a well-collimated and highly accelerated ion beam for sputtering.
    • Employing argon ion sputtering on tungsten and tungsten/tantalum alloy targets.
    • Applying a combination of pre-shadowing and deposition for object replication.

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    Main Results:

    • Achieved high-resolution shadowing and films with grains smaller than 1 nm.
    • Demonstrated successful replication of fine objects using tungsten/tantalum pre-shadowing.
    • Determined the resolution of carbon replicas based on replicated magnesium oxide crystal corners.

    Conclusions:

    • Argon ion sputtering is a valuable method for high-resolution shadowing and preparing ultra-fine grained films.
    • The technique allows for detailed replication of fine objects, crucial for nanoscale analysis.
    • Optimized sputtering parameters yield superior resolution in replica formation.