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Electromagnetic wave preventing filter, manufacturing method thereof and display comprising the filter

A technology of anti-electromagnetic wave and manufacturing method, which is applied to the parts of instruments, gas discharge tubes/containers, conductive materials dispersed in non-conductive inorganic materials, etc., can solve problems such as complex processes, improve optical characteristics, and simplify manufacturing Process, the effect of improving product quality

Inactive Publication Date: 2009-12-09
DONGJIN SEMICHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of double-sided lamination will lead to complex processes.

Method used

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  • Electromagnetic wave preventing filter, manufacturing method thereof and display comprising the filter
  • Electromagnetic wave preventing filter, manufacturing method thereof and display comprising the filter
  • Electromagnetic wave preventing filter, manufacturing method thereof and display comprising the filter

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0131] According to the following components and contents, mix acrylate polymer resin, solvent, glass powder, conductive metal, black pigment and dispersant, stir at room temperature, and finally use a three-roller mill to produce the required gravure offset printing black conductive paste composition.

[0132] The black conductive paste composition contains 6% by weight of acrylate polymer resin and monomer, 7% by weight of diethylene glycol monobutyl ether acetate (BCA), 7% by weight of diethylene glycol mixed in a weight ratio of 66.7:33.3. 2.2% by weight of methyl ethyl ether, 0.3% by weight of dispersant, 75% by weight of conductive metal, 5.5% by weight of black powder and 4% by weight of glass powder.

[0133] Among them, the weight-average molecular weight of the acrylate polymer resin is 15000, which is composed of methyl acrylate (MA), butyl methacrylate (BM), hydroxyethyl methacrylate (HEMA) and methyl methacrylate (MMA). They are formed by copolymerization in part...

Embodiment

[0137] Preparation of anti-electromagnetic wave filter

[0138] Gravure offset printing was performed according to the pattern specification for the electromagnetic wave shielding filter by using the paste composition prepared in the above-mentioned preparation example.

[0139] i.e. by using as Figure 4 The same offset printing apparatus as shown, printed the paste composition onto the tin side of a transparent strengthened glass substrate to form a mesh-like pattern. At this time, the line width of the mesh-like pattern was 25 μm, and the standard average pitch between the patterns was 270 μm.

[0140] Then, in the firing process, at a temperature of 500-540° C., the tin surface of the transparent strengthened glass substrate is kept for 20 minutes in the state where the paste composition is coated, so as to form a mesh pattern for an electromagnetic wave filter.

experiment example

[0145] Characteristic Evaluation of Anti-Electromagnetic Wave Filter

[0146] The following standards were used to compare and evaluate the optical values ​​such as blackness and yellowing of the anti-electromagnetic wave filters provided by the examples and comparative examples, and the results are shown in Table 1. A total of six batches of tests on the optical value difference of each substrate surface were carried out, and the average value was calculated after each batch was printed 30 times. In addition, the durability of the mesh-shaped electromagnetic shielding printed matter provided in Examples and Comparative Examples was evaluated, and the evaluation criteria are as follows.

[0147] Evaluation Criteria for Optical Properties

[0148] Under the condition of a white light source, a D65 light source is applied to the surface opposite to the printed surface of the transparent strengthened glass substrate provided with a screen-shaped anti-electromagnetic wave fil...

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Abstract

The present invention relates to an electromagnetic wave preventing filter and a display with the same. The electromagnetic wave preventing filter comprises the following components: a transparent strengthened glass substrate which has a tin surface with more tin abundance and has an air surface with less tin abundance compared with the tin surface; and an electromagnetic wave shielding part which is formed on the tin surface of the transparent strengthened substrate with a screen mesh shape. The filter is used for shielding the electromagnetic wave in a plasma display panel. Furthermore the external light reflection can be reduced and the blackness can be increased according to appropriate yellowing phenomenon of the conductive metal in the tin surface and the electromagnetic shielding part. Additionally the wet fastness problem can be reduced furthest even the printing layer in the final product is exposed in the external gas environment.

Description

technical field [0001] The invention relates to an anti-electromagnetic wave filter suitable for use on a display such as a plasma display panel, a manufacturing method thereof, and a display having the filter. The anti-electromagnetic wave filter can improve pattern quality and printability, and improve continuous process efficiency , especially the optical characteristics of the plasma display device can be excellent, and even if the printed surface thereof is exposed to the external air environment, it can also have good moisture resistance. Background technique [0002] Recently, various displays have been developed. For example, plasma display (PDP), liquid crystal display (LCD) and organic light-emitting display (OLED) have been developed. Due to their thinness and light weight, these displays are widely used in many products that need to display images. [0003] On the other hand, various electronic components in the display emit EMI (Electromagnetic Interference), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00C03B18/02C03C17/36G12B17/04H01B1/00H01B1/02H01B1/16H01B1/22G09F9/00G09F9/313H01J11/44
CPCH01J2211/446H05K9/0096
Inventor 田承勋李宗旭卞景绿白娜英郑粲潣朴赞硕
Owner DONGJIN SEMICHEM CO LTD
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