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Chemical copper plating method for liquid-phase PEG (Polyethylene Glycol) optically-grafted modified PET (Polyethylene Glycol Terephthalate) film

A technology of electroless copper plating and photografting, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve the problems of strong irritation and corrosiveness of acrylic acid, unfavorable industrial operation, increase cost, etc. Excellent comprehensive performance, smooth and bright surface, and the effect of improving bonding force

Active Publication Date: 2012-06-27
HUIZHOU KING BROTHER CIRCUIT TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this patent are: 1. High-purity nitrogen must be introduced during the grafting reaction, which is not conducive to industrial operation and will increase the cost; Volatile acetone is used as the solvent of the initiator 3. Acrylic acid is highly irritating and corrosive, and it is easy to self-polymerize and explode under the action of light, oxygen, and water

Method used

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  • Chemical copper plating method for liquid-phase PEG (Polyethylene Glycol) optically-grafted modified PET (Polyethylene Glycol Terephthalate) film
  • Chemical copper plating method for liquid-phase PEG (Polyethylene Glycol) optically-grafted modified PET (Polyethylene Glycol Terephthalate) film
  • Chemical copper plating method for liquid-phase PEG (Polyethylene Glycol) optically-grafted modified PET (Polyethylene Glycol Terephthalate) film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) PET film chemical degreasing and micro-etching: Put the PET film in 20g / L NaOH, 1g / L SDBS (sodium dodecylbenzenesulfonate), 3g / L NaOH 2 CO 3 , 5g / L Na 3 PO 4 12H 2 Soak in the mixed solution of O for 10 minutes at 50°C and rinse with tap water.

[0016] (2) Liquid-phase photografting: the PET film after degreasing is placed in the PEG (average molecular weight is 12000) and 1wt% potassium persulfate solution containing 0.02mol / L, the depth of solution is 1cm. The power of the ultraviolet lamp is 15W, the dominant wavelength is 200nm, and the height of the lamp from the liquid surface is 2cm. The photografting time was 20 minutes.

[0017] (3) Activation: Rinse the grafted PET membrane with deionized water, and then put it in a solution containing 0.5g / LAgNO 3 and 10mL / L 37%NH 3 ·H 2 O solution for 2 minutes, and finally rinse the surface of the PET film with deionized water.

[0018] (4) Electroless copper plating: Put the activated PET film into the electr...

Embodiment 2

[0020] (1) PET film chemical degreasing and micro-etching: Put the PET film in 20g / L NaOH, 1g / L SDBS (sodium dodecylbenzenesulfonate), 3g / L NaOH 2 CO 3 , 5g / L Na 3 PO 4 12H 2 Soak in the mixed solution of O for 10 minutes at 50°C and rinse with tap water.

[0021] (2) Liquid-phase photografting: the PET film after degreasing is placed in the PEG (average molecular weight is 12000) and 1wt% potassium persulfate solution containing 0.025mol / L, the depth of solution is 1cm. The power of the ultraviolet lamp is 15W, the dominant wavelength is 200nm, and the height of the lamp from the liquid surface is 3cm. The photografting time was 15 minutes.

[0022] (3) Activation: Rinse the grafted PET membrane with deionized water, and then put it in a solution containing 0.5g / LAgNO 3 and 10mL / L 37%NH 3 ·H 2 O solution for 1 minute, and finally rinse the surface of the PET film with deionized water.

[0023] (4) Electroless copper plating: Put the activated PET film into the electr...

Embodiment 3

[0025] (1) PET film chemical degreasing and micro-etching: Put the PET film in 20g / L NaOH, 1g / L SDBS (sodium dodecylbenzenesulfonate), 3g / L NaOH 2 CO 3 , 5g / L Na 3 PO 4 12H 2 Soak in the mixture of O for 10 min at 50 °C and rinse with tap water.

[0026] (2) Liquid-phase photografting: the PET film after degreasing is placed in the PEG (average molecular weight is 12000) and 1wt% potassium persulfate solution containing 0.03mol / L, the depth of solution is 1cm. The power of the ultraviolet lamp is 15W, the dominant wavelength is 200nm, and the height of the lamp from the liquid surface is 2cm. The photografting time is about 15 minutes.

[0027] (3) Activation: Rinse the grafted PET membrane with deionized water, and then put it in a solution containing 0.5g / LAgNO 3and 10mL / L 37%NH 3 ·H 2 O solution for 2 minutes, and finally rinse the surface of the PET film with deionized water.

[0028] (4) Electroless copper plating: Put the activated PET film into the electroless ...

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Abstract

The invention discloses a method for performing liquid-phase PEG optical grafting and chemical copper plating on the surface of a polyethylene glycol terephthalate (PET) film. The method comprises the following steps of: removing oil and stains from the PET film basically, performing micro-etching, and performing liquid-phase grafting on long-chain polyethylene glycol serving as a non-ion surfactant by taking potassium persulfate as an initiator under the radiation of an ultraviolet lamp to improve the hydrophily and adsorption capability of the film; and immersing the grafted film into a silver nitrate solution to adsorb silver for catalyzing chemical copper plating. The method is easy to operate, is environmentally-friendly, and is economical and practical. As proved by a test result, copper plating performance is high, a copper layer is bright and flat, the surface resistance is 0.2 omega, and the average thickness is 1.21 mum, the bonding force is up to 17.3 N / cm; and the method can be used for producing a flexible circuit board and an electromagnetic shielding material.

Description

technical field [0001] The invention belongs to the technical field of surface modification, functionalization and metallization of non-metallic materials, and relates to a method and process for carrying out liquid-phase PEG photografting and electroless copper plating on the surface of a polyethylene terephthalate film. Background technique [0002] Polyethylene terephthalate, whose English name is polyethyleneglycol terephthalate (abbreviated as PET), is formed by polycondensation of two monomers, polyethylene terephthalic acid and ethylene glycol. Since PET film has good mechanical properties, thermodynamic properties, physicochemical properties and dielectric properties, it has received more and more attention. At present, the base material polyimide used in industry is expensive and not resistant to strong alkali, which will have a certain impact on the production process. Therefore, if electroless copper plating can be performed on the PET film with excellent performa...

Claims

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Application Information

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IPC IPC(8): C23C18/20C23C18/30C23C18/38
Inventor 武守坤李柱梁潘湛昌程果周光辉张慧冲肖楚民
Owner HUIZHOU KING BROTHER CIRCUIT TECH
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