Laser-induced adhesives with excellent adhesion enhancement and reduction capabilities for transfer printing of microchips

作者：Chenglong Li, Shun Zhang, Jing Jiang, Suhao Wang, Shuchang He, Jizhou Song · 发表于：Science Advances · 年份：2024 · DOI：10.1126/sciadv.ads9226 · 被引用次数：49 · 研究领域：Adhesion, Friction, and Surface Interactions、Advanced Sensor and Energy Harvesting Materials、Interactive and Immersive Displays

Transfer printing based on tunable and reversible adhesive that enables the heterogeneous integration of materials is essential for developing envisioned electronic systems. An adhesive with both adhesion enhancement and reduction capabilities in a rapid and selective manner is challenging. Here, we report a laser-induced adhesive, featuring a geometrically simple shape memory polymer layer on a glass backing, with excellent adhesion modulation capability for programmable pickup and noncontact printing of microchips. Selective and rapid laser heating substantially enhances the adhesive's adhesion strength from kilopascal to megapascal within 10 ms due to the shape fixing effect, allowing for precise and programmable pickup. Conversely, the enhanced adhesion can be quickly reduced and eliminated within 3 ms through the shape recovery effect, enabling noncontact printing. Demonstrations of transfer printing microlight-emitting diodes (LEDs) and mini-LEDs onto various low-adhesive flat, rough, and curved surfaces highlight the unusual capabilities of this adhesive for deterministic assembly.