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Conductive paste for laser etching, conductive thin film, and conductive laminate

A conductive thin film, laser etching technology, which is applied to conductive materials dispersed in non-conductive inorganic materials, conductive layers on insulating carriers, and removal of conductive materials by light, which can solve problems such as complicated processes and large environmental loads. , to achieve the effect of reducing laser output, ensuring continuity, and excellent suitability

Active Publication Date: 2015-04-01
TOYO TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the environmental impact due to waste liquid treatment is large, and the process is complicated, and there are still many problems from the viewpoint of production efficiency and cost.

Method used

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  • Conductive paste for laser etching, conductive thin film, and conductive laminate
  • Conductive paste for laser etching, conductive thin film, and conductive laminate
  • Conductive paste for laser etching, conductive thin film, and conductive laminate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0092] In order to further explain the present invention in detail, the following examples and comparative examples are given, but the present invention is not limited by the examples. In addition, each measured value described in an Example and a comparative example was measured by the following method.

[0093] 1. Number average molecular weight

[0094] The sample resin was dissolved in tetrahydrofuran so that the resin concentration became about 0.5% by weight, and filtered using a polytetrafluoroethylene membrane filter with a pore size of 0.5 μm to prepare a GPC measurement sample. Tetrahydrofuran was used as the mobile phase, Gel Permeation Chromatography (GPC) Prominence (trade name) manufactured by Shimadzu Corporation was used, and a differential refractive index detector (RI meter) was used as the detector. GPC measurement of the resin sample was carried out per minute. In addition, the number-average molecular weight was calculated by omitting the part correspond...

manufacture example

[0144] Production example of polyester resin P-1

[0145] Put 700 parts of terephthalic acid, 700 parts of isophthalic acid, 16.9 parts of trimellitic anhydride, 983 parts of ethylene glycol, and 2-methyl-1,3- 154 parts of propylene glycol were heated up from 160° C. to 230° C. over 3 hours under a pressure of 2 atmospheres in a nitrogen atmosphere to perform an esterification reaction. After releasing the pressure, put 0.92 parts of tetrabutyl titanate, and then slowly reduce the pressure in the reaction system to 5 mmHg in 20 minutes, and then carry out 40 minutes at 260°C under a vacuum of 0.3 mmHg or less. polycondensation reaction. Then, under nitrogen flow, it cooled to 220 degreeC, and 50.6 parts of trimellitic anhydrides were injected|thrown-in, and it reacted for 30 minutes, and polyester resin was obtained. Table 1 shows the composition and physical properties of the obtained copolyester resin P-1.

[0146] Production example of polyester resin P-2 to P-11

[014...

Embodiment 1

[0164] Dissolving polyester resin P-1 in EDGAC so that the solid content concentration is 35% by mass is 2,860 parts (1,000 parts in terms of solid content), 7,888 parts of flaky silver powder 1, and 71 parts of Kyoei as a leveling agent Mix MK Conc manufactured by Sha Kagaku Co., Ltd., 30 parts of Disperbyk 130 manufactured by BYK Chemical Japan Co., Ltd. as a dispersant, and 300 parts of EDGAC as a solvent, and disperse three times in a refrigerated three-roll mixer . After that, the obtained conductive paste was printed on a predetermined pattern, and then dried at 120° C. for 30 minutes to obtain a conductive film. Basic physical properties were measured using this conductive thin film, and then laser etching processing was examined. Table 4 shows the evaluation results of the paste, paste coating film, and laser etching processability.

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Abstract

To provide a conductive paste for laser etching, which is suitable for laser etching that is capable of producing a high-density electrode circuit wiring line having an L / S of 50 / 50 mum or less at low cost with a little burden on the environment, said high-density electrode circuit wiring line having been considered difficult to be produced by conventional screen printing methods. A conductive paste for laser etching, which contains (A) a binder resin that is formed of a thermoplastic resin, (B) a metal powder and (C) an organic solvent; a conductive thin film that is formed using the conductive paste; a conductive laminate; an electrical circuit; and a touch panel.

Description

technical field [0001] The present invention relates to a method for producing a conductive pattern capable of producing a conductive pattern having a high arrangement density in a planar direction, and to a conductive paste applicable to the production method. Typically, the conductive pattern of the present invention can be used for electrode circuit wiring of a transparent touch panel. Background technique [0002] In recent years, the performance and miniaturization of electronic devices equipped with transparent touch panels represented by mobile phones, notebook computers, and e-books are rapidly advancing. In order to achieve high performance and miniaturization of these electronic devices, in addition to the miniaturization, high performance, and improvement of the integration level of the mounted electronic components, high density of the electrode circuit wiring that connects these electronic components is also required. change. As transparent touch panel methods...

Claims

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Application Information

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IPC IPC(8): H01B1/22G06F3/041H01B5/02H01B5/14H05K1/09H05K3/08
CPCG06F3/041H01B1/22H05K1/095H05K3/027H05K2201/09363H05K2203/107G06F2203/04103
Inventor 滨崎亮大前慎太郎
Owner TOYO TOYOBO CO LTD
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