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Updated: Jan 11, 2026

Design and Development of a Three-Dimensionally Printed Microscope Mask Alignment Adapter for the Fabrication of Multilayer Microfluidic Devices

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Coherence-length-constrained OPC for efficient mask segmentation in advanced lithography.

Haoyong Wang, Ying Li, Qiang Wu

|November 11, 2025

Summary

This summary is machine-generated.

A new coherence-length-based optical proximity correction (OPC) method simplifies mask fabrication by limiting edge segmentation. This approach reduces mask complexity and computational cost in advanced lithography without compromising image quality or performance.

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Last Updated: Jan 11, 2026

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Published on: June 12, 2018

Area of Science:

Optical lithography
Nanofabrication
Image processing

Background:

Coherence length defines optical correlation range, crucial for imaging systems.
Current optical proximity correction (OPC) methods increase mask complexity and cost.
Existing OPC over-segments edges, yielding no image quality improvement.

Purpose of the Study:

To propose a novel OPC method based on coherence length.
To reduce mask complexity and computational cost in advanced lithography.
To maintain or improve imaging performance and exposure latitude.

Main Methods:

Simulations analyzing mask variations' effect on aerial images and critical dimensions (CD).
Development of a coherence-length-based OPC method.
Restricting polygon edge segmentation to within the coherence length (max 3 segments).

Main Results:

Mask variations significantly impact aerial image contours and CD within coherence length.
The proposed method effectively mitigates image ripples for complex 2D patterns.
Comparable critical dimension (CD) and exposure latitude (EL) performance achieved.

Conclusions:

Coherence length provides a physical boundary for effective OPC.
The proposed method enhances mask correction efficiency and simplifies fabrication.
This approach offers practical guidance for advanced lithography mask optimization.