Precision printing is the core work of the research group. Through the new process of prefabricated circuit pattern - substrate pattern transfer - ink-jet printing, it is possible to realize the preparation of micron scale electronic circuits based on ink-jet printing; Through the development of functional ink materials, key technical issues such as multi-layer interface function regulation, printable ink optimization, and multi-layer structure accurate overprint were solved to verify the feasibility of printing to prepare high-precision sensor arrays; In combination with the printing process, we can realize large-scale green additive manufacturing of precision electronic circuits. Based on this technology, we will carry out corresponding engineering research on laboratory technology, successfully realize the landing transformation, and meet the market demand of capacitive sensing, electromagnetic shielding, smart home, display, energy and other industries.

Printing electronic technology is a new electronic manufacturing technology based on the printing process. Compared with the traditional silicon based semiconductor microelectronics technology, the printing electronics technology uses additive manufacturing technology based on solution processing, which has the advantages of simple process flow, low process temperature, flexible processing, green environmental protection, easy mass production and manufacturing (as shown in the figure below), and forms an extremely good technical complementarity with the traditional silicon based microelectronics technology. At present, printed electronics has been applied in new energy, intelligent packaging, intelligent sensor, 5G communication, information display and other fields. It can be predicted that the next 10 years will be a golden period for the development of precision manufacturing technology of printing and electronics in China. Printing and electronics technology will have a significant impact on human production and lifestyle, and may drive the next industrial technology revolution, which will greatly support the country's major strategic plan of "Made in China 2025".

However, due to the characteristics of process equipment and ink spontaneous movement, the precision of traditional printing manufacturing technology is only about 50 microns, which cannot directly meet the preparation requirements of 1-50 microns fine circuits. Aiming at the problem of low precision of current printing and manufacturing technology, the Precision Printing and Manufacturing Engineering Center has designed and carried out research on surface energy difference patterning process, key electronic ink materials, printing process and integrated electronic product development, and strives to achieve large area green additive manufacturing of 1-50 μ m fine electronic functional structure. Based on this key technology, it meets the requirements of information sensing, Internet of Things, automotive electronics Core application requirements such as smart home (see the figure below).