Many times, by looking at electronics circuits I noticed that they have like small holes printed in yhem. The question I want to ask is, what s the purpose of these holes?


closed as off-topic by Qmechanic Jun 23 '16 at 11:30

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  • $\begingroup$ It s like in this image... Why are there holes there? $\endgroup$ – Domenico Bagnato Jun 23 '16 at 8:33
  • $\begingroup$ This should be asked in the electronic engineering SE. $\endgroup$ – lemon Jun 23 '16 at 8:58
  • $\begingroup$ It should. But some of them are needed for screws - btw square holes where additional things to carry round screws are known as bosses - but I believe that a hole could be a good idea even without a screw. One saves some material and makes it possible to attach things or send a wire through it, and so on. $\endgroup$ – Luboš Motl Jun 23 '16 at 9:23

The regular spacing and sheer amount of holes in that image is a bit unusual, but I nevertheless suspect that most or all of them are vias: holes drilled through multiple layers of the PCB and plated with copper on the inside to provide an electrical connection between layers. A large number of regularly spaced vias in contiguous planes may be used to spread the current path and therefore also the heat profile between two layers.


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