New method "carved" the fastest flexible silicon transistor
The scientific research team of the University of Wisconsin-Madison in the United States wrote in the journal Science Reports published on the 20th that they used a unique method to develop the fastest flexible silicon-based transistor that can wirelessly transmit data and energy. It is expected to be used in many fields including wearable electronic devices and sensors.
The current cut-off frequency of this flexible silicon transistor is a record 38 gigahertz (GHz), and simulations show that its highest cut-off frequency can even be as high as 110 gigahertz (GHz). In the computer field, the higher the cut-off frequency, the faster the processing speed of the transistor.
The study was led by Zhenqiang Ma, a professor of electronics and computers and engineering at the University of Wisconsin-Madison, and by Kim Jong-hoon, a scientist. They used low-temperature processing to draw circuits on flexible single-silicon transistors placed on a polyethylene terephthalate (PET) substrate with the help of simple and inexpensive nanoimprint technology.
In conventional selective doping methods, impurities are generally introduced into a material at precise locations to enhance its conductivity, but sometimes the dopant is mixed into regions of the material where it does not belong, resulting in a short channel effect. But in the latest study, the researchers took a different approach: using a dopant to cover the monocrystalline silicon instead of selective doping.
They added a layer of photosensitive material to the transistor, and used electron beam lithography to create a reusable nano-pattern model on it; then according to the pattern in the model, a dry etching process was used to cut a precise nano-trench on the silicon, and a wide switch that can be used as a switch was added to the trench.
Because the high-performance transistor has a unique three-dimensional current pattern, it consumes less power and is more efficient. Moreover, compared with the traditional manufacturing process, the new method can be divided into narrower trenches, which will also help to cluster more transistors on a single electronic device.
Ma Zhenqiang pointed out that the latest method is easy to upgrade, for high-performance, low-cost roll-to-roll process, enabling semiconductor manufacturers to produce high-performance transistors with wireless Internet access at a lower cost.
On August 17, Yingtianhui held a summary of work safety in the first half of 2023 and a work plan meeting for the third quarter. Tian Shujing, Secretary of the Party committee, chairman of the board and director of the safety committee of the company, presided over the meeting. A total of 39 company leaders, members of the safety committee, professional leaders and safety management personnel attended the meeting.
In order to improve the leadership and execution of middle-level managers, strengthen communication and cooperation, and improve their overall quality, Yingtianhui carried out middle-level management quality improvement training in the form of special lectures or case analysis from July 21 to November 3 according to the training plan at the beginning of the year.
Li Xingjian, member of the Standing Committee of Changshou District Committee and Minister of United Front Work Department of Chongqing Yingtianhui Chlor-Alkali Chemical Co., Ltd., led a team to Yingtianhui to carry out a cool and refreshing condolence activity.
On August 3, Li Xingjian, member of the standing Committee of the Changshou District CPC Committee and head of the United Front work Department, and Wei Beneng, deputy director of the United Front work Department of the District CPC Committee and secretary of the party group of the Federation of Industry and Commerce, led a team to Yingtianhui to carry out a high-temperature condolence activity with the theme of "sending coolness in summer and reaching the front line of true feelings. Ying Tianhui deputy general manager Xiao Min accompanied the condolences.
Yingtianhui organized the safety knowledge competition of "everyone talks about safety, everyone will respond to emergencies"
In order to thoroughly publicize and implement the spirit of the 20th CPC National Congress and General Secretary Xi Jinping's important exposition on production safety, comprehensively promote production safety publicity and education, enhance the self-protection awareness and emergency rescue ability of the broad masses of workers, and lay a solid foundation for the company's production safety. On June 27, Yingtianhui organized a safety knowledge competition of "everyone talks about safety, everyone will respond to emergencies.
Yingtianhui Successfully Held the Art Party of "Practicing New Ideas, Showing New Ideas and Striving for New Journey"
In order to solemnly celebrate the 102 anniversary of the founding of the Communist Party of China and carry forward the great party building spirit, Yingtianhui held a theatrical performance with the theme of "Practicing New Ideas and Showing New as a New Journey" on the evening of June 27.