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Related Experiment Video

Updated: Jun 15, 2025

Planar and Three-Dimensional Printing of Conductive Inks
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Planar and Three-Dimensional Printing of Conductive Inks

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3D Printing of Metals with sub-10 µm Resolution.

Jizhe Wang1,2,3, Jiajun Shou2,3, Dongna Liu2,3

  • 1School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|August 26, 2024
PubMed
Summary

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This summary is machine-generated.

A new embedded-writing embedded-sintering (EWES) process enables high-fidelity 3D printing of metallic microstructures with sub-10 µm resolution for microelectromechanical systems (MEMS). This breakthrough allows for complex, freeform metallic designs previously unattainable.

Area of Science:

  • Materials Science
  • Additive Manufacturing
  • Microfabrication

Background:

  • Microscale 3D metallic architectures are crucial for microelectromechanical systems (MEMS), including microelectronics, metamaterials, and biomedical devices.
  • Existing photolithography and additive manufacturing methods struggle to produce micro-scaled metallic structures with freeform 3D geometries.

Purpose of the Study:

  • To develop a novel fabrication process for high-fidelity, arbitrary metallic motifs with sub-10 µm resolution.
  • To overcome the limitations of current technologies in manufacturing complex 3D micro-scale metallic structures.

Main Methods:

  • An embedded-writing embedded-sintering (EWES) process was developed using a thermally stable paraffin wax matrix.
  • Silver nanoparticle ink was printed and pre-sintered within the matrix, achieving resolutions down to approximately 7 µm.
Keywords:
3D metallic structure3D printing of metalembedded 3D printingmetallic 3D printing

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Last Updated: Jun 15, 2025

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  • The pre-sintered structures were then embedded in a salt bath for final sintering to create freeform 3D metallic motifs.

    • Main Results:

    • High-fidelity fabrication of arbitrary metallic motifs with sub-10 µm resolution was achieved for the first time.
    • Demonstrated 3D printing of various micro-scale silver architectures, including micro-spring arrays, BCC lattices, horn antennas, and rotatable windmills.
    • The EWES process allows for precise control over printing resolution by tuning matrix components.

    Conclusions:

    • The EWES process offers a viable pathway for fabricating complex 3D micro-scale metallic structures with high fidelity.
    • This method can be extended to other metals and metal oxides requiring high-temperature sintering, enabling advanced 3D MEMS.
    • The technology facilitates the design and fabrication of 3D MEMS with intricate geometries and enhanced functionalities.