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Method for manufacturing thickened silk printing plate and method for silk printing blue gel by using thickened silk printing plate

A production method and screen technology, which are applied in the transfer method, printed circuit, printed circuit manufacturing and other directions to achieve the effect of improving the quality of silk screen printing, improving production efficiency and shortening the production process.

Active Publication Date: 2015-11-11
JIANGMEN SUNTAK CIRCUIT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problem that the existing screen printing blue glue technology needs to undergo secondary screen printing to reach a thickness of 0.25-0.55mm, and provides a method for making a thickened screen plate and a method for using the thickened screen printing blue glue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment provides a method for making a thicker screen, comprising the following steps:

[0025] (1) Stretching: Use a rectangular screen with a mesh number of 18T, a thickness of 0.16mm, and a screen tension of 18-24N / cm2. First, check whether the screen is damaged, and tighten the undamaged screen on the On the screen frame, clean both sides of the screen with sticky rollers to clean both sides of the screen.

[0026] Prepare the photosensitive paste: mix the photosensitive paste and sensitizing powder, and stir for 2-3 minutes, then let it stand for more than 2 hours to eliminate the air bubbles in the glue, then pour the photosensitive paste into the scraper and set aside.

[0027] (2) One-time grouting:

[0028] Evenly coat the photosensitive paste on the screen, then place the gauze at 40±3°C and bake for 50 minutes to cure the photosensitive paste, and the photosensitive paste will become a photosensitive film.

[0029] The coating method is to place the...

Embodiment 2

[0040] This embodiment provides a method for screen printing blue glue on a PCB, and uses the thickened screen prepared in Embodiment 1 for screen printing. The method of screen printing blue glue includes the following steps:

[0041] (1) Screen printing blue glue

[0042] Put the PCB into the screen printing machine, and adjust the position with a thicker screen plate, and then evenly coat the blue glue on the PCB, the thickness of the blue glue is 0.51mm. The viscosity of the blue glue used is 700-1000dPa·s, and the screen printing pressure is 5-6kg / cm 2 .

[0043] (2) Heat curing blue glue

[0044] Put the PCB in an oven at 155°C and bake for 45 minutes to preliminarily cure the blue glue on the PCB to form a blue glue layer with a thickness of 0.4mm.

[0045] (3) Exposure and development

[0046] Move the PCB to the exposure machine, and after developing, the graphics on the film are transferred to the blue glue layer.

[0047] (4) baking sheet

[0048] After clean...

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Abstract

The invention relates to the technical field of PCB production, especially to a method for manufacturing a thickened silk printing plate and a method for silk printing blue gel by using the thickened silk printing plate. After slurry coating for second and third times, pressure-sensitive adhesive is pasted on the silk printing plate to increase the coating space. Relative thick photosensitive slurry can be coated on the silk printing plate. After coating for a third time, the thickness of the photosensitive film formed by dried photosensitive slurry reaches 0.35mm. An 18 silk printing plate is used to produce the thickened silk printing plate, of which the thickness reaches 0.51mm. When the thickened silk printing plate is used for silk printing blue gel, the thickness of the blue gel reaches 0.51mm, and the thickness of the blue gel after plate baking reaches 0.4mm. When the thickened silk printing plate is used for silk printing blue gel on PCB, the production requirement that the thickness of the blue gel reaches 0.25-0.55 mm can met through one-time silk printing. The production flow of silk printing blue gel is shortened, and the production efficiency is improved. When the thickened silk printing plate is used, silk printing pressure force of 5-6 kg / cm2 is adopted to make blue gel blanking complete, uniform and voidless and improve the quality of silk printed products.

Description

technical field [0001] The invention relates to the technical field of PCB production and manufacturing, in particular to a method for making a thickened screen and a method for using a thickened screen printing blue glue. Background technique [0002] In the production and processing of PCB (Printed Circuit Board, printed circuit board), according to the design requirements, blue glue needs to be screen-printed on some PCBs, and the thickness of the blue glue is generally required to be 0.25-0.55mm after baking. However, the screen used for screen printing blue glue is composed of 18T gauze and screen graphics on the gauze. The diameter of the wire of the 18T screen is 0.160mm, and the thickness of the screen graphics is generally 0.07mm. The total thickness is 0.23mm. Use such a screen to screen-print the blue glue on the PCB. The thickness of the blue glue on the PCB is 0.23mm. After baking the blue glue, the thickness of the blue glue on the PCB is generally 0.15mm, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K3/12
CPCH05K3/1225H05K2203/0531
Inventor 叶文钰胡志勇白会斌
Owner JIANGMEN SUNTAK CIRCUIT TECH
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