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A method of growing highly adhesive silver metal pattern on the surface of polyimide film

A technology of polyimide film and high adhesion, applied in metal material coating process, coating, liquid chemical plating, etc. Problems such as patterning and low metal utilization efficiency, to achieve the effect of facilitating industrial production, simple and fast method, and easy operation

Active Publication Date: 2019-06-18
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can realize silver coating on the surface of polyimide film, it is difficult to realize the surface metal patterning of polyimide film.
The direct external deposition method can form a metal pattern on the surface of polyimide film with the help of a template, but there are problems of poor adhesion and low metal utilization efficiency; the in-situ one-step self-metallization method and the direct ion exchange self-metallization method can only achieve The silver layer is covered on the surface of polyimide, but the surface patterning cannot be realized; the surface modification ion exchange method can realize surface patterning by ion exchange from metal after selective surface etching of polyimide , but the process is complicated, the polyimide needs to be opened and then closed, and it can be completed after multiple steps

Method used

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  • A method of growing highly adhesive silver metal pattern on the surface of polyimide film
  • A method of growing highly adhesive silver metal pattern on the surface of polyimide film
  • A method of growing highly adhesive silver metal pattern on the surface of polyimide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A: the polyamic acid (PAA) solution of the BPDA-ODA system with a solid content of 12% is cast into a film, and placed in a fume hood for 24 to 36h to dry to obtain the semi-dry PAA film of the BPDA-ODA system;

[0036] B: AgNO 3 , water, glycerol and ethanol are mixed according to mass ratio (a) 6:4:7:2 and (b) 8:4:7:2 respectively under 20 ℃, and after fully stirring, silver colloids with different silver contents are obtained;

[0037] C: Apply the silver colloid obtained in step B to the surface of the PAA membrane obtained in step A at 20°C according to the pre-designed pattern for ion exchange for 20 minutes. Then rinse with deionized water to obtain a polyamic acid film containing silver ions in the superficial layer;

[0038] D: Put the polyamic acid film containing silver ions obtained in step C into a high-temperature oven for heat-induced reduction, the final temperature is 300 ° C, and the time is 4 hours, so as to prepare a silver-coated polyimide film wit...

Embodiment 2

[0041] A: the polyamic acid (PAA) solution of the BPDA-ODA system with a solid content of 15% is cast into a film, and placed in a fume hood for 24 to 36h to dry to obtain the semi-dry PAA film of the BPDA-ODA system;

[0042] B: AgNO 3 , water, glycerol and ethanol are mixed according to the mass ratio of 7:4:8:2 at 30°C, and the silver colloid is obtained after fully stirring;

[0043] C: Apply the silver colloid obtained in step B to the surface of the PAA membrane obtained in step A at 30°C according to a pre-designed pattern for ion exchange, and the time is (a) 20min and (b) 40min respectively. Then rinse with deionized water to obtain a polyamic acid film containing silver ions in the superficial layer;

[0044] D: Put the silver-ion-containing polyamic acid film obtained in step C into a high-temperature oven for heat-induced reduction, the final temperature is 350°C, and the time is 4 hours, so as to prepare a surface-patterned silver-coated polyimide film .

[004...

Embodiment 3

[0047] A: the polyamic acid (PAA) solution of the BPDA-ODA system with a solid content of 12% is cast into a film, and placed in a fume hood for 24 to 36h to dry to obtain the semi-dry PAA film of the BPDA-ODA system;

[0048] B: AgNO 3 , water, glycerol, ethylene glycol and ethanol are mixed according to the mass ratio of 8:6:4:3:2 at 30°C, and the silver colloid is obtained after fully stirring;

[0049] C: Apply the silver colloid obtained in step B to the surface of the PAA film obtained in step A at 30°C according to the pre-designed pattern for ion exchange for 30 minutes. Then rinse with deionized water to obtain a polyamic acid film containing silver ions in the superficial layer;

[0050] D: apply (a) 0.02mol / L DMAB or (b) 0.1mol / L alkaline glucose solution at 30°C to the surface of the polyamic acid membrane containing silver ions obtained in step C for 30min. Then rinse with deionized water;

[0051] E: Put the polyamic acid film containing silver ions obtained i...

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Abstract

The invention discloses a method for growing a high-cohesiveness silver metal pattern on the surface of a polyimide film and belongs to the technical field of polyimide / silver composite films. The method comprises the following steps: firstly, preparing a semi-dry polyamide acid (PAA) film, uniformly coating the surface of the film with a cohesive colloidal silver salt solution according to a designed pattern, holding the film for a certain time to ensure that silver ions are diffused into the superficial layer of the PAA film according to the designed pattern and generate ion exchange reaction with carboxyl in the PAA, thereby obtaining a silver ion-containing PAA film; and carrying out direct heat treatment or heat treatment after chemical reduction to ensure that the PAA is cyclized into polyimide and the silver ions are automatically reduced under the action of thermal induction or reduced in situ in the presence of a reducing agent and aggregated on the surface of the film at the same time, thereby forming the silver metal pattern with the designed shape on the surface of the polyimide film. The method is suitable for all polyimide systems and has the advantages that the coating of the silver metal pattern with arbitrary shapes can be realized; the interface cohesiveness is excellent; the process is simple; and one-step forming is realized.

Description

technical field [0001] The invention belongs to the technical field of polyimide / silver composite film, and relates to a method for growing a highly adhesive silver metal pattern on the surface of a polyimide film. Background technique [0002] Polyimide (PI) is a class of high-performance polymers containing an imide structure in its molecular structure. It has excellent temperature resistance, mechanical properties, dielectric properties and radiation resistance, and has a low thermal expansion coefficient and chemical resistance. Excellent, so it is widely used in the preparation of films, plastics, coatings, advanced composite materials, adhesives, electronic devices and optoelectronic components. In recent years, the surface metallization of polyimide has become one of the research hotspots in the field of materials. Among them, covering the surface of the polyimide film with a metal silver layer or a metal silver pattern is particularly attractive. This is because th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/44
CPCC23C18/1607C23C18/44
Inventor 齐胜利徐君田国峰武德珍
Owner BEIJING UNIV OF CHEM TECH
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