Metal structure preparation method and processing equipment based on roll-to-roll printing technology

Abstract

The invention relates to a preparation method and processing equipment of a metal structure based on roll-to-roll printing technology, wherein the preparation method includes the following steps: providing a flexible substrate, depositing metal ink on the flexible substrate to form a patterned metal Ink coating; heating the metal ink coating to remove volatile components; sintering the heated metal ink coating to form a metal structure; sintering the heated metal ink coating to form a metal structure In the step, the metal ink coating is sintered by ultrasonic vibration. The method adopts heating first and then ultrasonic vibration sintering treatment, the time required for sintering is short, the obtained metal structure has good electrical conductivity and smooth surface, and can realize roll-to-roll continuous and uninterrupted production and improve production efficiency.

Description

technical field [0001] The invention relates to the technical field of OLED metal structure manufacturing, in particular to a method for preparing a metal structure based on roll-to-roll printing technology and processing equipment. Background technique [0002] Roll-to-roll (roll-to-roll) printing technology refers to the process technology of printing flexible electronic devices on flexible or elastic films by continuous rolling. The roll-to-roll printing technology is suitable for printing OLED (Organic Light-Emitting Diode, organic light-emitting diode) displays of various sizes, and has the characteristics of high production efficiency, low production cost and mass production. [0003] Metal structures, such as copper, silver, aluminum, etc., are widely used in OLED displays in the form of metal electrodes, metal circuits, and metal grids. To fabricate an entire OLED display using roll-to-roll printing, the printing method of the metal structure must be considered. In...

AI Technical Summary

Problems solved by technology

[0004] At present, traditional sintering methods mainly include thermal sintering, ultraviolet sintering and electric sintering, etc., which have certain limitations and shortcomings in application or performance. It is difficult to combine traditional sintering methods with roll-to-roll printing technology

Among them, the equipment required for thermal sintering is simple, and the metal structure after sintering has good electrical conductivity, but the required temperature is high and the time is long, and the surface of the metal structure after sintering is rough or even has tiny cracks, which affects the metal structure. The contact performance when the structure is used as an electrode; the time required for ultraviolet sintering is short, but the resistance of the metal structure after sintering is high, which limits the electrical conductivity when used as a circuit; electric sintering, although the sintering time is short and the electrical conductivity is good, but the process is complicated. Before electric sintering, metal ink needs to be thermally sintered to the extent that it can conduct electricity, and electric sintering requires the metal structure to be a continuous geometric structure, so its application is limited to metal circuits and metal grids, and it is difficult to be applied to metal electrodes.

Images