Hello Everyone,
I’m new to Kicad 7.0 and im trying to change the Annular ring size for the Inner layers to be different from the outer top and bottom layers.
for example outer annular ring size to be 0.7mm diameter and the inner annular ring size to be 0.35.
I found this to be done in Altium Designer but im not sure hot to do it in Kicad
I have attached a picture for illustration of what i want to achieve.
could anyone help me please
thank you.
I suspect you can’t . . . but you could create a footprint with a “via” (through hole pad) of the correct size and then add a SMD pad on top of the larger size. I know it’s a workaround but it should work.
Right now you can only set the properties to automatically remove the annular ring on inner layers if there is no connection to the via.
Which is probably what the OP wants.
There is no magic that the drilling is more accurate on the inner layers
Yes indeed, totally agree.
@Ram_m17 What is your goal for wanting smaller annular rings on inner layers?
Annular rings on via’s exist mostly because of drill tolerances. The idea is that even with a tolerance the side of the drill will still be inside the annular ring.
If there is no track connected to the via at a particular layer, then there is also no need at all to place an annular ring on that via.
In KiCad you can easily remove annular rings for unused pads. with PCB Editor / Tools / Remove unused Pads.
Also, removing these does not have any negative impact on the production process. It just took years for people to realize that you can easily remove them, and for software to support that function.
Removing annular rings does have significant advantages, because more room is left open on the inner layers to route tracks. This is especially useful with big DIP packages or long connectors, where the amount of tracks you can route between the pins is a limiting factor.
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