PCB Protection: Potting or Conformal Coating?

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PCB Protection: Potting or Conformal Coating? | PCB Knowledge

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PCBWay

Күн бұрын

Пікірлер: 18

@yougeo Күн бұрын

It's important to note that most epoxy potting solutions can be boiled in water and at the 212 degrees Fahrenheit will soften enough to turn into sort of a gel that can usually be peeled apart in pieces and taken off

@PCBWay Күн бұрын

Thanks for the additional information!

@AchievementDenied 10 ай бұрын

I'm wondering why some battlebots don't use the potting method to protect the more sensitive boards from being slammed around

@greengreyable 10 ай бұрын

Because of cost? It's more common in mass fabricated electronics where one or few mold (or in this case 'pots') can be reused over and over again. Plus it's only practical if you have no plan on reworking on the circuits later because once it's potted it's impossible to be removed without damaging the circuit.

@boxcarhobo8315 10 ай бұрын

3d printing negates the cost. However thermal transfer goes down vs direct air contact. You could use silicone to be peelable, but as above thermal transfer conductivity would be lowered. ESCs for driving brushless DC motors get hot. Wireless does as well. All methods make repairability drop.

@AchievementDenied 10 ай бұрын

@@boxcarhobo8315 hmm, couldn't thermals be solved by using a heat-sink and heat transfer lines similar to how gaming laptops move heat? or would the heat dissipation not be enough? (the thought of having them potted is specifically for boards that aren't going to be modified and would continue as-is after they were finalized.)

@boxcarhobo8315 10 ай бұрын

@@AchievementDenied Thats a good question. Another thought would be to pot it, but to the point where you could still have access to the top surface for cooling. Sadly, I changed jobs and don't have the workshop I used to, and my electronics work is now for the hobby level.

@dzidmail 6 ай бұрын

@boxcarhobo8315 you got it backwards. Silicone is much better thermal conductor than air. It's just a pain to debug or repair anything once it's coated.

@electronics.unmessed 2 ай бұрын

Thx for sharing! Very interesting!

@Joel-wt7yg 9 ай бұрын

Is there a solder flux that doesn't cause cure inhibitions with platinum cure silicon potting compounds? Some factory solder joints with flux residues don't have the issue but I don't have any information on what solder flux they are using. Any knowledge about the issue would be much appreciated!