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Related Experiment Video

Updated: Apr 15, 2026

Laser-induced Forward Transfer of Ag Nanopaste

Laser-induced Forward Transfer of Ag Nanopaste

Published on: March 31, 2016

Laser forward transfer using structured light.

Raymond C Y Auyeung, Heungsoo Kim, Scott Mathews

|April 4, 2015

Summary

This summary is machine-generated.

A digital micromirror device (DMD) spatially structures laser beams for laser decal transfer (LDT). Edge-enhanced beam profiles significantly reduced the laser transfer energy threshold for printing microscale features.

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Last Updated: Apr 15, 2026

Laser-induced Forward Transfer of Ag Nanopaste

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Published on: March 31, 2016

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

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Published on: January 28, 2019

Laser-induced Forward Transfer for Flip-chip Packaging of Single Dies

Laser-induced Forward Transfer for Flip-chip Packaging of Single Dies

Published on: March 20, 2015

Area of Science:

Materials Science
Optics and Photonics
Additive Manufacturing

Background:

Laser-induced forward transfer (LIFT) is a microfabrication technique.
Digital micromirror devices (DMDs) offer precise spatial light modulation.
Optimizing laser parameters is crucial for high-resolution LIFT.

Purpose of the Study:

To investigate the use of a DMD for spatial structuring of laser beams in LDT.
To analyze the impact of DMD properties (resolution, half-toning, beam shaping) on LDT.
To determine if modified beam profiles can lower the energy threshold for feature transfer.

Main Methods:

Utilized a 532 nm laser and a DMD to structure the laser beam for LDT.
Employed silver nanopaste layers for transfer experiments.
Investigated various DMD-generated beam profiles, including edge-enhanced checkerboards.
Measured the laser transfer fluence threshold for printed features.

Main Results:

Demonstrated spatially congruent feature printing using DMD-structured laser beams.
Edge-enhanced checkerboard beam profiles decreased the transfer fluence threshold by approximately 30% compared to standard profiles.
Successfully printed 10-μm square features from a 20-pixel bitmap pattern.

Conclusions:

DMDs are effective for spatial beam structuring in LDT processes.
Optimized beam profiles, such as edge-enhanced patterns, can significantly lower the energy requirements for microscale feature transfer.
This approach enhances the efficiency and applicability of laser decal transfer for microfabrication.