Solder dots around mounting hole - what are they for?

Thread Starter

Toby180

Joined Oct 22, 2023
4
Hi,

can anyone explain to me, what the purpose of these dots is? It is a mounting hole, and a screw will sit on them.

Cheers,

Toby solderdots.jpg
 

MaxHeadRoom

Joined Jul 18, 2013
28,515
But there is already a coppersurface on the other side, connected to the vias to the right. Why is there then not just a free coppersurface too?
Could be a few reasons, the raised spots reduce the chance of the screw doing any damage when tightened, also, and especially if the screws have serrations under the head, it enhances grip of the screw.
 

ronsimpson

Joined Oct 7, 2019
2,894
I put "VIAs" around the hole for the bolt. It looks something like what you showed. See picture below.
I found that sometimes the bolt strips out the feedthrough and disconnects the top pad from the bottom pad. Also disconnects the internal layers.
1698000894150.png
 
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