Research Of Improving The Consistency Of Printed Carbon Nanotube Devices Performance

Printing electronic technology is based on the principle of electronic manufacturing technology,Which printing way to make electronic products of the production process.Its characteristic is that it can realize low cost, large area to build the flexible electronics, to meet the requirements of the electronics industry to reduce costs, expand market..Printing electronic technology research for many electronic industry wide attention in developed countries, According to forecast of related organizations, The printed electronics industry market share is expected to reach$330billion by2027,In liquid crystal display, solar cells, and printed radio frequency identification (RFID) tag, and other fields has been widely used. In using the method of printing production of electronic products research and development, Printing thin film transistor device is the core of the printed circuit components, Its performance directly affects the quality of the printed electronics. Semiconductor features of ink printing film is one of the key technical difficulties. To a large extent, the inherent properties of semiconductor materials determines the printing performance of thin film transistor devices. Compared with other semiconductor materials, represented by carbon nanotube linear materials, itself has good electrical properties, avoid the complex process, such as crystal, semiconductor carbon nanotube size, excellent electrical properties, physical and chemical properties stable, easy to realize the solubilization, composed of networks are more likely to become the ideal semiconductor properties, is to build high-performance printing thin film transistor device are one of the most ideal semiconductor materials.However, this kind of linear materials composed of electronic ink in the printing process of randomness of the network, large area of printing products, different parts of the electrical properties will be a larger difference. Based on linear materials printing performance of electronic devices and therefore has a larger nonuniformity, under certain conditions the completely same structure of the device will be even more than10times the performance of the gap. For printing the linear material inhomogeneity of academic and technology research problem has not been fundamentally solved. Ordering arrangement in linear materials usually achieve relatively harsh conditions, such as high electric field, magnetic field, it is difficult to large-scale popularization and application, the research and development of current industry more focused on the difficulty smaller printing, metal materials academics focused on finding and synthesis of new materials. Is vital for product performance of semiconductor material electrical performance uniformity, domestic related research, there is no world within the scope of the study reported in this field is also very rare.This paper will from the device design, basal, electrode, preparation technology, prepress, India post-processing of factors influencing the electrical performance of uniformity may be to conduct a comprehensive system of research. Including the electrode thickness and electrode channel length on the influence of the carbon nanotube film, carbon nanotube printing times and prepress, India post-processing on the electrical properties, and the influence of the new device structure to improve the device performance consistency. In terms of thickness of electrode, using ink-jet printing, inkjet equipment and air flow inkjet printer on the analysis of different types of ink for printing the same ink research of different substrate, ink performance directly determines the printing effect of the electrode, the physical properties of the ink itself such as surface tension, viscosity, volatile, printing condition requirements for equipment is different, the effect of the print is different also, In addition, the surface of the substrate to the film print electrode effect also has an immediate impact, basal affinity-disaffinity water performance of ink film-forming performance influence is very big also, before printing device for cleaning and hydrophobic surface plasma treatment, can make the printed ink film is more uniform, ink-jet printing, inkjet printing equipment TEC-IJ-060type of silver ink on PET flexible substrate the thinnest thickness of electrode for at least350nanometers thick, air jet printing equipment to print source in north India silver ink, the thinnest thickness of electrode to500nanometers thick. According to the properties of the CNT, thin layer of printed electrodes and a comparative study of thick electrode thin layer electrode can significantly increase the homogenous performance of the device. Printing with CNT can take a scattered, separate operation, such as average length will be greatly reduced because of these operations, usually printed with the length of the CNT is less than500nanometers, Under the condition of current technology, it is impossible to make such tiny channel width, under normal circumstances, the silver electrode of channel length is more than ten times the length of the CNT, according to the properties of the CNT, do all the components of the width of the channel is too long, for CNT in even the implications, between the electrodes in CNT electrode between even produce very big effect, so the uniform performance also has a great influence on the device.CNT device using multipoint sampling principle, puts forward a new type of device structure, increase the fork refers to the number, on expanding our scope of distribution in contact with CNT electrode, reduce the uncertainty of CNT contact, to suppress printing due to the uneven distribution of CNT performance fluctuations, offset caused by uneven distribution of CNT in the device performance change, achieve the goal of improving product electrical performance uniformity. The electrodes of the crossing teeth structure obviously improved the uniformity of device performance, film printing line material on the electrical performance uniformity of surge, to promote the industrialization of electronic products of printing method to lay a solid foundation.