Magnetically Driven Non‐Contact Transfer Printing Based on a Bi‐Stable Elastomeric Stamp

Abstract

AbstractTransfer printing that enables the heterogeneous integration of a variety of materials in desired 2D or 3D layouts is essential for developing existing and envisioned systems such as flexible electronics, stretchable electronics, and micro LED displays. Here, a simple yet robust magnetically driven non‐contact transfer printing technique based on a bi‐stable elastomeric stamp is reported. This stamp features adhesive blocks, a magnetic‐response film with a buckled configuration and a cavity. The magnetic‐response film can be controlled with a rapid snap‐through under a magnetic field to switch interfacial adhesion from strong state for reliable pick‐up to weak state for easy printing, which allows the printing of inks onto arbitrary receivers. Experimental, numerical, and theoretical studies reveal the fundamental aspects of design and operation of the stamp to enable a highly efficient non‐contract transfer printing technique. Demonstrations of this concept in transfer printing of Si platelets, papers, pearl cottons, glass slides, and porous acrylic plates onto various challenging non‐adhesive receivers (e.g., cleanroom wiper, cloth, leather, glass, or paper) illustrate its robust capabilities in manipulation of objects with a wide range of materials and its great potential for deterministic assembly, thereby creating engineering opportunities in applications requiring the heterogeneous integration of diverse materials.