A method for making an aluminum substrate solder resist screen plate to prevent photosensitive paste from falling off

Abstract

An aluminum substrate resistance welding screen making method for preventing photosensitive slurry from falling off comprises the following steps: (1) using double-sided adhesive to paste a PET protective film to each of the positions, corresponding to the running tracks at the two ends of a scraper, on the front of a screen mesh; (2) applying glue water to the positions, corresponding to the PET protective films, on the back of the screen mesh, and naturally drying the glue water for a period of time after glue water applying to make the PET protective films cured on the screen mesh; (3) before photosensitive slurry is applied, adding boiling oil water to the photosensitive slurry according to the ratio of 30ml boiling oil water to 1kg photosensitive slurry, manually stirring the boiling oil water and the photosensitive slurry, and letting the mixture stand for a period of time; (4) spray-coating a given photosensitive slurry applying position of the screen mesh with the photosensitive slurry added with boiling oil water; and (5) after the photosensitive slurry is applied, baking the screen in an oven for a period of time to make the photosensitive slurry cured on the screen mesh. By using the method, the problem that the photosensitive slurry on the mesh in the positions of the two ends of the scraper is easy to fall off is improved effectively, the product quality is improved, and the service life of the screen is increased.

Description

technical field [0001] The invention belongs to the technical field of solder resist printing, and in particular relates to a method for preparing an aluminum substrate solder resist screen plate to prevent photosensitive paste from falling off. Background technique [0002] Soldering is to screen a layer of photosensitive ink on the circuit and substrate with a screen and other tools. After exposure and development, a layer of solder resist ink is left on the circuit and substrate that do not need to be welded on the surface of the printed board, which plays a role in soldering. Insulate, prevent oxidation, and beautify the appearance. One of the tools used in screen printing ink is a screen. The screen of the solder mask screen in the industry is a white screen (use photosensitive paste to seal the area that does not need screen printing, leaving only The size of the printed board is for the ink to be oiled), and the photosensitive paste of the solder resist screen will fa...

AI Technical Summary

Problems solved by technology

[0004] ① Use photosensitive paste with better adhesion - high cost;

[0005] ② The end of the scraper is chamfered - the improvement is not complete;

[0006] ③ The life of the screen plate is reduced to control, and the method of applying photosensitive paste multiple times is used - the efficiency is slow;

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