Nanoscale flexible electronic transfer printing method driven by surface tension

Abstract

The invention discloses a surface tension driven nanoscale flexible electronic transfer printing method. According to the method, a circular ring and viscous liquid are used for extracting and printing an electronic device film floating in cleaning liquid to any complex curved surface receptor. Due to the characteristic that a viscous liquid film is easy to break, current transfer printing does not need a traditional transfer printing interface competitive fracture and strong and weak adhesion regulation and control strategy; the liquid film does not need to introduce prestress, and is suitable for a nanoscale film which cannot bear and a receptor which does not bear pressure; the viscous liquid film is non-uniform in deformation under local load, and is suitable for non-uniform diversity and compact space curved surface transfer printing; the thickness of the viscous liquid film and the thickness of the electronic device film are in the nanometer level, and flexible electrons prepared through transfer printing can form the in-situ measurement effect; the viscous liquid film is transparent and clear, what you see is what you get, and accurate positioning of transfer printing is facilitated; the transfer printing residual viscous liquid does not cause the reduction of the electromagnetic performance of the flexible electronic device; the method is simple in process, low in requirements on electronic device films and acceptor matrix materials and good in universality.

Description

technical field [0001] The invention belongs to the technical field of micro-nano processing and flexible electronics, and relates to a nanoscale flexible electronic transfer printing method driven by surface tension. [0002] technical background [0003] Flexible electronic technology refers to the fabrication of organic or inorganic material electronic devices on flexible substrates, making flexible electronic devices stretchable and bendable, and has a wide range of applications in energy, information, medical and other fields, such as flexible Electronic displays, organic light-emitting diodes, electronic skin, etc. Transfer printing is one of the important means to realize the preparation of this technology. It is a method of transferring electronic devices from the donor (manufacturing) substrate to the acceptor (application) substrate. It mainly includes two parts of picking and placing, involving the strength of the interface. Adhesive conversion is more difficult t...

AI Technical Summary

Problems solved by technology

Most of the existing transfer printing methods only complete the planar transfer printing at the micron and above size level, the transfer process is invisible, which is not conducive to the precise positioning of the device, and it is necessary to apply a certain pre-pressure to control the interface adhesion strength during the transfer printing, which is may damage the device

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