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Related Experiment Video

Updated: Jul 4, 2025

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Edge smoothing optimization method in DMD digital lithography system based on dynamic blur matching pixel overlap

Shengzhou Huang, Bowen Ren, Yuanzhuo Tang

    Optics Express
    |February 1, 2024
    PubMed
    Summary

    Digital micromirror device (DMD) lithography edge smoothness is improved using a novel dynamic blur effect matching pixel overlay technology. This method significantly reduces sawtooth defects, enhancing microfabrication fidelity.

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    Area of Science:

    • Optical Engineering
    • Microfabrication Technologies
    • Digital Lithography

    Background:

    • Digital micromirror device (DMD) based lithography suffers from low edge smoothness and sawtooth defects due to non-integer pixel errors.
    • These limitations hinder high-fidelity microfabrication processes requiring precise pattern definition.

    Purpose of the Study:

    • To enhance the edge smoothness of images produced by DMD digital lithography.
    • To address the sawtooth defects inherent in current DMD lithography techniques.

    Main Methods:

    • A novel pixel overlay method, termed DMD digital lithography based on dynamic blur effect matching pixel overlay technology, was developed.
    • The core innovation involves introducing a controlled motion blur effect during pixel overlap for lithography optimization.

    Main Results:

    • Simulation and experimental results demonstrated a significant reduction in sawtooth edge defects, from 1.666 µm to 0.27 µm.
    • The optimized method using a 1/2 dynamic blur effect with pixel displacement superposition achieved a substantial improvement in edge smoothness.

    Conclusions:

    • The proposed dynamic blur effect matching pixel overlay technology effectively improves the edge smoothness of lithographic patterns.
    • This optimization method offers a promising solution for high-fidelity and efficient DMD digital lithography microfabrication.