Mass transfer for Micro-LED display: Transfer printing techniques

Micro-LED display, which is regarded as the next-generation display technology, has obtained immense attention and great development during the past 2 decades. Mass transfer is the key step for the assembly of Micro-LED displays, which require the integration of Micro-LED chips from the fabrication wafers onto the display panel. Transfer printing is an emerging deterministic assembly technique and provides a versatile solution with great promise for mass transfer. Here, we firstly reviewed and compared the existing mass transfer techniques and then provided a brief review on the basic principles, typical protocols and the latest development of transfer printing techniques.