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Micromachines
Volume 16
Issue 9
10.3390/mi16090969
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Transparent and Fine Film Stencils with Functional Coating for Advanced Surface Mount Technology

by
Byoung-Hoon Kang
*,
Wonsoon Park
,
Kyungjun Park
,
Hunjoong Lee
,
Junjong Yoo
,
Namsun Park
and
Chulyong Jung
Global Technology Research, Samsung Electronics Co., Ltd., Suwon 16677, Republic of Korea
*
Author to whom correspondence should be addressed.
Micromachines 2025, 16(9), 969; https://doi.org/10.3390/mi16090969
Submission received: 21 July 2025 / Revised: 11 August 2025 / Accepted: 22 August 2025 / Published: 22 August 2025
(This article belongs to the Special Issue Microfabrication and Nanotechnology in Manufacturing Systems)
Versions Notes

Abstract

Technological advancements for the miniaturization of electronic components highlight a critical role of thin and durable stencils in advanced surface mount technology. Here, we report a transparent and fine film stencil consisting of a clear polyimide film and a functional diamond-like carbon coating layer for the fine-pitch surface mount technology process. High-quality and burr-free apertures in the thin film result from the thermally stable laser-cut process using a repetitive and low-power irradiation of nanosecond pulse laser, enhancing the printing accuracy of solder paste with fewer solder joint defects. The carbon coating layer with an electrostatic discharge composition facilitates smooth and robust surfaces and sidewalls of the apertures for the high solder paste release and high mechanical durability of the fine film stencil. The low-cost and easy fabrication of the fine film stencil accelerates the potential industrial replacement of the conventional metal stencils at a reduced thickness and further open a new opportunity for the mass production of the fine-pitch surface mount technology process.
Keywords: surface mount technology; film stencil; clear polyimide; diamond-like carbon coating; miniaturization surface mount technology; film stencil; clear polyimide; diamond-like carbon coating; miniaturization

Share and Cite

MDPI and ACS Style

Kang, B.-H.; Park, W.; Park, K.; Lee, H.; Yoo, J.; Park, N.; Jung, C. Transparent and Fine Film Stencils with Functional Coating for Advanced Surface Mount Technology. Micromachines 2025, 16, 969. https://doi.org/10.3390/mi16090969

AMA Style

Kang B-H, Park W, Park K, Lee H, Yoo J, Park N, Jung C. Transparent and Fine Film Stencils with Functional Coating for Advanced Surface Mount Technology. Micromachines. 2025; 16(9):969. https://doi.org/10.3390/mi16090969

Chicago/Turabian Style

Kang, Byoung-Hoon, Wonsoon Park, Kyungjun Park, Hunjoong Lee, Junjong Yoo, Namsun Park, and Chulyong Jung. 2025. "Transparent and Fine Film Stencils with Functional Coating for Advanced Surface Mount Technology" Micromachines 16, no. 9: 969. https://doi.org/10.3390/mi16090969

APA Style

Kang, B.-H., Park, W., Park, K., Lee, H., Yoo, J., Park, N., & Jung, C. (2025). Transparent and Fine Film Stencils with Functional Coating for Advanced Surface Mount Technology. Micromachines, 16(9), 969. https://doi.org/10.3390/mi16090969

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