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Conductive paste, light-permeable conductive film using the paste, and manufacturing method of the light-permeable conductive film

A technology of conductivity and paste, which is applied in the field of light-transmitting conductive films, can solve the problems of reduced printing suitability, high thixotropy of conductive paste, inability to obtain electromagnetic wave shielding conductivity, etc., and achieve high aperture ratio, high Effects of electromagnetic shielding and transparency

Active Publication Date: 2009-01-21
TAIYO INK MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a large amount of flaky silver powder is mixed, the thixotropy of the conductive paste is too high, and the printability in the gravure printing method is reduced, so it is not suitable for applications such as electromagnetic wave shielding films that form fine lines.
On the other hand, in order to form fine wires, there is a method of reducing the particle size of the silver powder and reducing the compounding amount, but it is difficult to cause contact between the conductive powders in the conductive paste, and the degree of electromagnetic wave shielding cannot be obtained. electrical conductivity

Method used

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  • Conductive paste, light-permeable conductive film using the paste, and manufacturing method of the light-permeable conductive film
  • Conductive paste, light-permeable conductive film using the paste, and manufacturing method of the light-permeable conductive film
  • Conductive paste, light-permeable conductive film using the paste, and manufacturing method of the light-permeable conductive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7 and comparative example 1～3

[0064] Each component was blended in the blending ratio shown in Table 1, and kneaded by a three-roll mill to obtain a conductive paste.

[0065]

[0066] Various characteristics of each conductive paste thus obtained were evaluated. The evaluation method is as follows.

[0067] (1) Determination of specific resistance value

[0068] A pattern of 0.5 cm×10 cm was formed on a glass substrate, and after heat treatment at 130° C. for 30 minutes, the resistance value was measured with a Milliohm HiTester, and the specific resistance value was calculated based on the sheet resistance and film thickness.

[0069] (2) Evaluation method of solvent resistance

[0070] After coating on a glass substrate with a 10 μm applicator and heat-treating at 130° C. for 30 minutes, rubbing solvent resistance was evaluated with acetone-impregnated waste cloth. The evaluation criteria are as follows.

[0071] ○: Almost no change

[0072] △: The coating film is slightly dissolved

[0073] ×:...

Embodiment 8～13 and comparative example 4～5

[0094] Each component was blended in the blending ratio shown in Table 3, and kneaded by a three-roll mill to obtain a conductive paste.

[0095] table 3

[0096]

[0097] Various characteristics of each conductive paste thus obtained were evaluated. The evaluation method is as described above.

[0098] These results are shown in Table 4.

[0099] Table 4

[0100]

[0101] From the results shown in Table 4, it can be seen that the conductive paste of the present invention can easily obtain a conductive pattern that has both conductivity and printability of thin lines. The visibility of the film was excellent.

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Abstract

The invention provides an electro-conductive paste and light transmitted conductive film using the paste and the manufacturing method thereof. The provided method is for manufacturing a display used light transmitted conductive film with the advantages of no complex processing, cheap, effective in shielding electromagnetic wave, good light transmission capacity and no damage to display contrast. The electro-conductive paste is characterized in that: it contains (A) organic binding agent resin, (B) electro-conductive powder, (C) coloring agent, (D) organic solvent, and (E) cross-linking agent; the number-average molecular weight of the organic binding agent resin (A) is between 3000 and 5000; the electro-conductive powder (B) comprises globular electro-conductive powder in the rate no less than 50 weight parts relative to the whole 100 weight parts powder.

Description

technical field [0001] The present invention relates to a conductive paste and a translucent conductive film for a display using the paste. In more detail, it relates to light transmittance useful as an electromagnetic wave shielding film for displays that blocks electromagnetic waves generated in front of displays such as CRT (Braun tube), PDP (plasma display panel), EL (electroluminescence), and panels. conductive film. Background technique [0002] At present, when it comes to monitors, CRT monitors are the representative ones, but recently, FPDs (flat panel displays) have replaced them, and thin TVs and the like have become popular in earnest. Among FPDs, LCD (liquid crystal display) and PDP are the first to be popularized, but in addition to these in the future, it is expected that FED (field emission display) such as SED (surface-conduction electron-emitter display) will attract attention. ) will also be popularized. [0003] In such various displays, electromagneti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/20H01B5/14H01B13/00C09D5/24C09J9/02
Inventor 佐佐木正树有马圣夫
Owner TAIYO INK MFG
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