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Circuit board character ink and printing method thereof

An ink printing, circuit board technology, applied in ink, household appliances, applications, etc., can solve problems such as affecting production efficiency, long production process, and increasing production costs

Active Publication Date: 2021-06-04
广东兴达鸿业电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of the two silk screens is long, and at the same time it takes a lot of manpower and material resources, which affects production efficiency and increases production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Mix and stir the main agent and curing agent according to the mass ratio of 0.94:0.06 to obtain character ink, adjust the viscosity to 450dPa·s, and then use 100T mesh to screen-print the character ink on the circuit board. The thickness of the screen-printed ink is 13 μm. The agent is composed of the following components in mass percentage: 36% epoxy resin, 25% titanium dioxide, 18% barium sulfate, 10% dibasic acid ester mixture and 11% auxiliary agent, and the photoinitiator in the auxiliary agent is dimethylamino Ethyl benzoate, stabilizer is 2-hydroxybenzophenone, dispersant is polyether modified dimethylsiloxane. Bake the silk-screened circuit board at 150°C for 20 minutes, and then check the flatness of the white oil block. The deviation is ±1.1 μm, which meets the requirements of laser engraving technology (the deviation does not exceed ±2 μm).

Embodiment 2

[0033] Mix and stir the main agent and curing agent according to the mass ratio of 0.94:0.06 to obtain the character ink, adjust the viscosity to 450dPa·s, and then use 100T mesh to screen-print the character ink on the circuit board. The thickness of the screen-printed ink is 8μm. The agent is composed of the following components in mass percentage: 36% epoxy resin, 25% titanium dioxide, 18% barium sulfate, 10% dibasic acid ester mixture and 11% auxiliary agent, and the photoinitiator in the auxiliary agent is 2,4 , 6-trimethylbenzoyl phenyl ethyl phosphonate, the stabilizer is tert-butyl catechol, and the dispersant is polyhydroxy carboxylic acid amide. Bake the screen-printed circuit board at 150°C for 20 minutes, and then check the flatness of the white oil block. The deviation is ±1.6μm, which meets the requirements of laser engraving technology.

Embodiment 3

[0035] Mix and stir the main agent and curing agent according to the mass ratio of 0.94:0.06 to obtain character ink, adjust the viscosity to 300dPa·s, and then use 100T mesh to screen-print the character ink on the circuit board. The ink thickness of the screen printing is 13μm. The agent is composed of the following components in mass percentage: 36% epoxy resin, 25% titanium dioxide, 18% barium sulfate, 10% dibasic acid ester mixture and 11% auxiliary agent, and the photoinitiator in the auxiliary agent is 2,4 , 6-trimethylbenzoyl-diphenylphosphine oxide, the stabilizer is hydroquinone, and the dispersant is acrylic acid copolymer. Bake the screen-printed circuit board at 150°C for 20 minutes, and then check the flatness of the white oil block. The deviation is ±1.5 μm, which meets the requirements of laser engraving technology.

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Abstract

The invention relates to a circuit board character ink and a printing method thereof, comprising a main agent and a curing agent, the mass ratio of the main agent to the curing agent is 0.93-0.94:0.06-0.07, and the main agent consists of the following mass percentages The composition of the ingredients: 35-37% of epoxy resin, 24%-26% of titanium dioxide, 17%-19% of barium sulfate, 9%-11% of dibasic acid ester mixture and 10%-12% of additives. The circuit board character ink of the present invention has improved the mass percentage of main agent, and adaptively adjusted the mass percentage of epoxy resin, titanium dioxide, barium sulfate and dibasic acid ester mixture in the main agent, increased solid content, thereby can Make the character ink not easy to shrink after silk-screen printing on the baking board, and the ink can fill the line and the hole position at one time, so as to achieve the purpose of making the white oil block formed on the circuit board smooth and flat without holes. Only one silk screen printing is needed to meet the laser engraving technology Requirements, reduce a screen printing process, improve production efficiency and reduce production costs.

Description

technical field [0001] The invention relates to the field of circuit boards, in particular to a circuit board character ink and a printing method thereof. Background technique [0002] As PCB products are used more and more widely, the requirements for circuit boards are also getting higher and higher. In the past, information was added by sticking barcodes on the white oil block (character ink) of the circuit board. Now some enterprises need to use laser engraving in order to improve production efficiency and process. The laser engraving technology has strict requirements on the white oil block, and does not allow the white oil block to have unevenness, voids, etc. Now, in order to meet the requirements, the industry has to carry out secondary silk screen printing. For the first silk screen printing, first fill the uneven places in the circuit board, such as plug holes, line intervals, etc., and then bake the board, and then do the second silk screen printing to make the w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/102C09D11/03
CPCC09D11/03C09D11/102
Inventor 农永辉黎钦伟
Owner 广东兴达鸿业电子有限公司
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