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The method of screen printing two inks on the circuit board

A technology of circuit boards and inks, applied in printed circuits, printed circuit manufacturing, printed circuit secondary processing, etc., can solve problems such as inaccurate assembly, achieve stable quality, controllable brightness, and simple process

Active Publication Date: 2020-04-21
广东依顿电子科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the brightness is not properly controlled, it will lead to inaccurate assembly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Bright oil: Sun WT-05C white oil, matte oil: ME8HA, the method of silk-screening two inks on the circuit board is as follows:

[0029] a. First pre-treat the circuit board with the circuit (speed 2.3-2.8m / min grinding board), and then use the 51T mesh double-sided screen printing one time solar WT-05C white oil, control the ink viscosity 150-170dps;

[0030] b. Expose the silk-screened solar WT-05C white oil circuit board at 73°C for 42 minutes after baking the board (exposure ruler 9-10 grids). After the exposure is completed, the yellow film must be separated by white paper to prevent the ink from sticking; For developing, adjust the developing pressure to 1.5kg / cm 2 , Development speed to 3.5-3.8m / min (specifically based on the first board), and then the upper and lower lamp energy is 350mJ / cm 2 Empty the circuit board again, and perform low-temperature baking on the circuit board in 5 sections at 50℃×60min+60℃×30min+75℃×30min+85℃×60min+110℃×60min;

[0031] c. Carry out sec...

Embodiment 2

[0034] Bright oil: Sun WT-05C white oil, matte oil: ME8HA, the method of silk-screening two inks on the circuit board is as follows:

[0035] a. First pre-treat the circuit board with the circuit (speed 2.3-2.8m / min grinding board), and then use the 51T mesh double-sided screen printing one time solar WT-05C white oil, control the ink viscosity 150-170dps;

[0036] b. Expose the silk-screened solar WT-05C white oil circuit board at 70°C for 50 minutes after baking the board (exposure ruler 9-10 grids). After the exposure is completed, the yellow film must be separated by white paper to prevent the ink from sticking; For developing, adjust the developing pressure to 1.5kg / cm 2 , Development speed to 3.5-3.8m / min (specifically based on the first board), and then up and down lamp energy 400mJ / cm 2 Empty the circuit board again, and perform low-temperature baking on the circuit board in 5 sections at 50℃×60min+60℃×30min+75℃×30min+85℃×60min+110℃×60min;

[0037] c. Carry out secondary pret...

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PUM

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Abstract

The invention discloses a method screen for printing two kinds of ink on a circuit board. The method comprises the steps that first pre-treating is carried out on the circuit board with a circuit, and then light oil is printed; exposing and developing are carried out after board baking; empty exposing and low temperature baking are carried out on the circuit board; secondary pre-treatment is carried out on the circuit board after low temperature board baking; board baking is carried out once again to improve the screen printing light oil viscosity; gloss oil is printed, and then board baking is carried out; secondary exposing and developing of the circuit board are carried out; high temperature baking is carried out on the circuit board after secondary developing; the cooled circuit board is sandblasted; and surface treatment is carried out. According to the invention, light oil and gloss oil are printed on the circuit board; the problem of oil leak caused by insufficient binding force of simultaneously printed light oil and gloss oil is solved by adding empty exposing and board baking and modifying high temperature parameters; controllable brightness is realized by sandblasting on gloss oil; and the method has the advantages of simple process and stable quality of the produced circuit board.

Description

【Technical Field】 [0001] The invention relates to a circuit board production method, in particular to a method for silk-screening two inks on a circuit board, and belongs to the technical field of printed circuit boards. 【Background technique】 [0002] The general circuit board production process is cutting, drilling, copper sinking, full board plating, outer dry film, pattern plating, etching, solder mask, characters, surface treatment, molding, electrical testing, FQC, FQA, packaging, etc. [0003] Existing circuit boards have only one color of solder mask on the surface, either only white, green or other colors are printed. There is a new market demand, and a layer of matte oil is screen printed on the circuit board after the gloss oil is printed. Due to the smooth and shiny characteristics of the gloss oil, the combination of the gloss oil and the matte oil is insufficient when the matte oil is screen-printed on the gloss oil surface, and there is a defect of oil rejection; in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K3/28
CPCH05K3/282H05K2203/1476
Inventor 莫介云
Owner 广东依顿电子科技股份有限公司