Flexible circuit suction filtration forming method

A molding method and flexible circuit technology, which are applied in separation methods, conductive pattern formation, chemical instruments and methods, etc., can solve the problems of limited circuit substrates, high costs, and unenvironmental production processes, and are conducive to recycling and good folding resistance. performance, low cost

Inactive Publication Date: 2012-12-12
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 pas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Use screen printing on the printing paper to make the reverse image of the target circuit pattern: that is, on the printing paper, the target circuit part is left blank, and the rest of the printing paper is printed with printing materials, and the printing materials used are solvent-based inks;

[0029] After the printing material is dry, put the printing paper on the sand core suction filter plate connected to the vacuum pump, cover it with a barrel-shaped cover with no top and bottom, and press the cover tightly on the surface of the substrate;

[0030] Pour 100ml of the ethanol dispersion of silver nanowires with a concentration of 1μg / ml into the cover, turn on the vacuum pump and start suction filtration: the silver nanowires in the ethanol dispersion of silver nanowires are deposited on the target circuit, forming the same as the target circuit. The conductive medium layer; the used silver nanowires have a diameter of 100-150nm and a length of 15-20μm.

[0031] A...

Embodiment 2

[0034] Use gravure printing to print the reverse image of the target circuit pattern on the filter paper, and the printing material used is solvent-based ink;

[0035] After the ink is dry, put the printed paper on the sand core suction filter plate, cover it with a barrel-shaped cover without top and bottom, and press the cover tightly on the surface of the substrate;

[0036] Pour 50ml of the silver flake aqueous dispersion with a concentration of 1mg / ml into the cover, turn on the vacuum pump and start suction filtration molding; the average diameter of the silver flakes used is 20 μm.

[0037] After the silver sheet aqueous dispersion is completely drained, turn off the vacuum pump, open the cover, take out the flexible circuit and put it on the press for pressurization, the pressure is 1MPa;

[0038] After the pressurization is completed, a UV-curable acrylate coating is sprayed on the circuit, and after being cured by UV light, the flexible circuit is completed.

Embodiment 3

[0040] Use screen printing to print the reverse image of the target circuit pattern on the porous polyethylene film, and the printing material used is UV-curable ink;

[0041] After curing the ink with ultraviolet light, place the printed paper on the sand core suction filter plate, cover it with a barrel-shaped cover without top and bottom, and press the cover tightly on the surface of the substrate;

[0042] Pour 150ml of the isopropanol dispersion of silver-plated copper flakes with a concentration of 10mg / ml into the cover, turn on the vacuum pump and start suction filtration molding; the average diameter of the silver-plated copper flakes used is 30 μm.

[0043] After the silver-plated copper sheet isopropanol dispersion is completely drained, turn off the vacuum pump, open the cover, take out the flexible circuit and put it on a press for pressurization with a pressure of 15MPa.

[0044] After the pressurization is completed, the silicone coating is brushed on the circui...

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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...

Claims

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Application Information

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IPC IPC(8): H05K3/10B01D37/00
Inventor 黄贵文肖红梅沈小军付绍云
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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