Xinhua news agency, San Francisco, Feb. 19 (reporter Wu Xiaoling) Bao Zhenan, a Chinese professor at Stanford University, reported in the British journal Nature on Feb. 19 that they have achieved a new breakthrough in manufacturing technology in the field of flexible electronics, and successfully developed a more easily mass-produced high-density, high-sensitivity stretch transistor array for the first time. This achievement is in the research of electronic skin, etc The research has a breakthrough significance.

The research of flexible electronic materials is a hot topic in the field of materials and electronics. This kind of materials can be used to make electronic skin with health monitoring function, flexible electronic screen and so on. The former flexible electronic technology can be stretched by sacrificing the density of electronic devices, which has great limitations and complex manufacturing process.

Wang Sihong and Xu Jie, the co first authors of the new research, said that they combined the research of materials and electronics, breaking the development limitations of electronic skin and other related products, and realizing the high density and high mechanical stretch of transistors at the same time. They have the general applicability to the stretch compound materials and can be used as the basic components of electronic skin equipment.

According to reports, the new results make the sensing and computing power of the electronic skin stronger and the "intelligence" higher. The transistor array density of this material reaches 347 per square centimeter, and its performance can be kept unchanged when it is stretched to twice the length. Its stability is tested to withstand at least 1000 stretches. Based on this, the team developed an electronic skin, which can adhere the flexible electronic device to the skin surface of human body. Compared with similar products, the wearing comfort, the amount of information obtained from the skin and the signal fidelity are significantly improved, which can be used for health monitoring and medical treatment in the future.

The researchers said that this process has the advantages of wide applicability of materials, stable transistor performance, high density, easy mass production, etc., and is in the leading position in the interdisciplinary field of flexible electronics, which is beneficial to the field of materials, electronic industry, medical application, etc.

In an interview with Xinhua news agency, Bao said that compared with the samples under laboratory conditions, the indicators such as transistor device density after industrialization will continue to improve. This kind of technology and products can achieve more new functions after being greatly improved in the aspects of softness, stretchability and degradability. It is expected to be widely used in human-computer interaction, flexible robot, augmented reality technology and other fields.