High-Efficiency Transfer Printing Using Droplet Stamps for Robust Hybrid Integration of Flexible Devices

Transfer printing has emerged as a deterministic assembly technique for moving thin-film semiconductors into desired layouts by using rubber stamps; however, replicating transfer printing for different semiconductors fails to achieve high efficiency, hindering the fast development of flexible hybrid electronics. In this work, a novel transfer printing technique using droplet stamps is developed based on Laplace pressure and surface tension. The working principle is explained by liquid bridge analysis and demonstrated by a 100% yield of transfer printing a batch of thin-film semiconductors with different materials, sizes, and shapes. Besides, the droplet stamps are used in fabricating epidermal hybrid optoelectronics for accurate blood pressure monitoring to verify their high working efficiency. Thus, taking advantage of eliminating Poisson effects and solving the incompatibility with conventional fabrication technologies, this technique will play an enabling role in hybrid integration and high-fidelity fabrication.

Automated summary

A novel transfer printing technique using droplet stamps has been developed based on Laplace pressure and surface tension, achieving 100% yield in transferring thin-film semiconductors with different materials, sizes, and shapes, and demonstrating high working efficiency in fabricating hybrid optoelectronics for blood pressure monitoring. This technique eliminates Poisson effects and resolves incompatibility with conventional fabrication technologies, making it a key player in hybrid integration and high-fidelity fabrication.