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Related Experiment Video

Updated: Jun 9, 2026

Large-area Scanning Probe Nanolithography Facilitated by Automated Alignment and Its Application to Substrate Fabrication for Cell Culture Studies
09:45

Large-area Scanning Probe Nanolithography Facilitated by Automated Alignment and Its Application to Substrate Fabrication for Cell Culture Studies

Published on: June 12, 2018

Dual-sided lithography: a method for evaluating alignment accuracy.

M W Farn, J S Kane, W Delaney

    Applied Optics
    |August 31, 2010
    PubMed
    Summary
    This summary is machine-generated.

    We developed a simple interferometric method to measure back-to-front aligner accuracy for lithographic patterns. This technique achieves +/-0.2 micrometer precision, aiding in precise substrate alignment during manufacturing.

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    Area of Science:

    • * Semiconductor Manufacturing
    • * Metrology and Measurement Science
    • * Optical Engineering

    Background:

    • * Accurate alignment of lithographic patterns on opposing substrate surfaces is critical for microelectronic device fabrication.
    • * Existing methods for back-to-front alignment may be sensitive to manufacturing variations and complex to implement.
    • * A need exists for a robust, simple, and precise measurement technique for back-to-front aligners.

    Purpose of the Study:

    • * To present a novel method for accurately measuring the performance of back-to-front aligners.
    • * To demonstrate the utility of the method as an aid in performing back-to-front alignments.
    • * To develop a measurement system that is insensitive to common manufacturing errors.

    Main Methods:

    • * The method employs interferometric principles for high-precision measurement.
    • * Utilizes binary optics technology for fabricating the measurement device.
    • * Designed for simplicity of implementation and operation.

    Main Results:

    • * The developed method can measure aligner accuracy with a precision of +/-0.2 micrometers.
    • * The interferometric approach demonstrates robustness against typical manufacturing inaccuracies.
    • * The system is straightforward to set up and use for alignment verification.

    Conclusions:

    • * The described interferometric method offers a simple, accurate, and reliable way to assess back-to-front aligner performance.
    • * The technique's insensitivity to manufacturing errors makes it suitable for industrial applications.
    • * This method can significantly improve the precision of lithographic pattern alignment in semiconductor fabrication.