Flexible circuit suction filtration forming method

Abstract

The invention relates to a flexible circuit suction filtration forming method, which comprises following steps that inverse printing of a target circuit graph is conducted on paper or a porous substrate through a printing way: the part of the target circuit graph on the paper or the porous substrate remains white, and the rest part of the paper or the porous substrate is painted with printing materials; after the printing materials are dried, the substrate is placed on a sand core suction filtration plate which is connected with a vacuum pump to be covered by a drum-shaped housing, and the housing compresses the surface of the substrate; conducting medium dispersion liquid with conducting medium micro-particles and concentration of 1microgram / ml to 100microgram / ml is poured into the housing, and the vacuum pump is started to conduct the suction filtration: the conducting medium micro-particles are deposited on the target circuit graphic part to form a conducting medium layer which is identical to the target circuit; after the conducting medium dispersion liquid is completely pumped, the substrate is taken out and placed into a press to be supercharged, and the conducting medium layer is compacted; and then a protective coating is coated on the conducting medium layer to obtain a flexible conducting circuit. The method has characteristics that the production process is clean and environment-friendly and the environment-friendly materials such as recyclable paper can be used as the substrate and has the advantage of low cost.

Description

Technical field: [0001] The invention relates to a forming method of a flexible circuit, in particular to a method for forming a conductive circuit on paper or a porous substrate assisted by vacuum suction. technical background: [0002] In recent years, flexible circuits have been widely used in the field of electronics. At present, flexible circuits can be seen in the data transmission parts of various electrical appliances, such as mobile phones, monitors, printers, digital cameras, etc. With the diversification and portability of modern electronic devices, flexible circuits that are bendable and resistant to flexion have gradually become an integral part of them. Today, the concept of the Internet of Things is being vigorously promoted, and the demand for electronic tags, an important information carrier, has also increased significantly. The electronic tag antenna is a kind of flexible circuit. At present, the molding methods of flexible circuits are mainly etching m...

AI Technical Summary

Problems solved by technology

The production process of etching molding is not environmentally friendly, and the circuit substrate is limited to polymer sheets or polymer films, which is not conducive to recycling

Although silver paste printed circuits can use environmentally friendly materials such as paper as the substrate, the high cost of using precious metals does not meet the low-cost requirements of large-scale applications.