About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-6: Heat-Affected-Zone–Free Laser-Cut PET Using a Sacrificial Layer for Flexible, Ultra-High-FoM Metal Meshes, EMI Shielding, and Joule Heating |
| Author(s) |
Mohammad Mehdi Zarei, Mirza Sahaluddin, Mostafa Bedewy, Paul Leu |
| On-Site Speaker (Planned) |
Mohammad Mehdi Zarei |
| Abstract Scope |
We report the first demonstration of heat-affected-zone (HAZ)–free laser cutting of PET using a 355 nm nanosecond laser enabled by a CA-600 acrylic emulsion sacrificial layer. This approach enables precise fabrication of HAZ-free square mesh patterns in PET. After laser writing and sacrificial-layer removal, the trenches are filled with silver ink to form high-aspect-ratio embedded metal meshes. Unlike conventional laser ablation of pre-deposited metals, which yields low figures of merit (FoM, σ_DC/σ_OP), this method produces high-performance metal meshes via a laser-based process, achieving an order-of-magnitude FoM improvement. The flexible Ag meshes exhibit sheet resistances of 0.16 Ω/sq at 79.0% transparency and 0.26 Ω/sq at 89.0% transparency, corresponding to FoMs of 9418 and 12084, respectively. The meshes provide transparent EMI shielding with shielding effectiveness up to 33.8 dB, show excellent bending durability, and function as flexible heaters, reaching 90.2 °C within 60 s at only 0.6 V. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Electronic Materials, Polymers, Thin Films and Interfaces |