PCB Protection: Potting or Conformal Coating? | PCB Knowledge

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PCB potting is a process where a printed circuit board or electronic component is immersed or coated with a protective material, usually a liquid or gel-like substance called potting compound.
Together with coating, they are both methods to protect circuit boards. Do you know the difference between the them? Find more information in the video.
Chapters:
00:00 Intro
00:53 Advantages of PCB Potting
01:22 Applications of PCB Potting
01:52 How does potting compare to conformal coating?
02:11 Protection strength
02:52 Flexibility and Rework
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Опубликовано:

30 июл 2024

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Комментарии : 15

@Joel-wt7yg 8 месяцев назад

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!

@AchievementDenied 9 месяцев назад

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

@greengreyable 9 месяцев назад

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 9 месяцев назад

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 9 месяцев назад

@@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 9 месяцев назад

@@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 месяцев назад

@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.