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

Abstract

Transfer 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.

Progress in Color Conversion Technology for Micro‐LED

“…It can even print on surfaces that are not absolutely flat. [152][153][154][155] In 2008, L. A. Kim et al combined QDs and used microcontact printing to prepare a 25 µm (1000 dpi) dot matrix, as shown in Figure 9a, which made it possible for QD contact printing to be used in the preparation of high-resolution [144] Copyright 2019, The Optical Society.…”

Regulatable interfacial adhesion between stamp and ink for transfer printing

“…Apart from the stamp decorated with magnetic particles, a buckled iron film was installed on the PDMS surface to realize noncontact magnetic‐driven transfer printing of a wide range of macroscopic objects (e.g., silicon platelets, pearl cottons, glass slides, and porous acrylic plates) using the same principle. [ 111 ]…”

Emerging Optoelectronic Devices Based on Microscale LEDs and Their Use as Implantable Biomedical Applications

“…The transfer printing methods pick up the released devices from the grown substrate and integrate them into the heterogeneous substrate, in which the representative carrier for the released devices are polydimethylsiloxane (PDMS) stamps [ 60 , 61 , 62 ], functional taps [ 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 ], and vacuum holders [ 72 ]. The adhesion between the released devices taken with the PDMS stamp carrier and the substrate is critical for the transfer printing process, as illustrated in Figure 1 d, in which the stamp and device adhesion intensity to the substrate is proportional to movement speed [ 60 ].…”