Solder mask screen printing method
A technology of silk screen printing and anti-soldering, which is applied in the secondary treatment of printed circuits, coating of non-metallic protective layers, etc. It can solve the problems of long operation time, many hidden dangers of quality, and ink holes, etc., so as to improve the effect of anti-soldering and save Time and efficiency improvement effect
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Embodiment 1
[0016] In this embodiment, the anti-soldering treatment is carried out on the audio-visual board with a plate thickness of 1.6mm. The process flow is: production of dot screen → pretreatment of copper plate → screen printing of dot screen on the first side → silk screen printing of dot screen on the second side → standing → Pre-baking → resting → alignment → exposure → resting → development → post-baking.
[0017] The specific operation steps are as follows: (1) Make the stop net, the length and short side coefficients of the stop net are both: 0.9999, all plug-in holes: increase 4mil on one side, the via hole with the window: the stop point with the drilling diameter 2 , Squeegee speed: 4m / min, the rest of the screen printing operation adopts the routine operation of those skilled in the art; (4) screen printing the second side of the block screen, the operation of the second side screen printing is the same as that of step (3) Screen printing on the first side, then screen pr...
Embodiment 2
[0024] In this embodiment, the high-frequency signal board with a plate thickness of 1.0mm is subjected to anti-soldering treatment. The operation process is: dot screen production → copper plate pretreatment → screen printing on the first side of the dot screen → silk screen printing on the second side of the dot screen → static Set → pre-baking → static → alignment → exposure → static → development → post-baking.
[0025] The specific operation steps are as follows: (1) Make the stop net, the length and short side coefficients of the stop net are both: 0.9999, all plug-in holes: increase 4mil on one side, the via hole with the window: the stop point with the drilling diameter 2 , Squeegee speed: 4m / min, the rest of the screen printing operations adopt the routine operations of those skilled in the art; (4) Block screen printing on the second side, the second side of the screen printing operation is the same as step (3) Block the screen printing on one side, then block the scr...
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