altiumpcb-design
I want to create a PCB with some traces on the solder layer, so I can reinforce them with tin.
Those traces will use AC current and about 5 amps. So I want to create some traces with 3mm wide and tin above.
I just see options to create traces on top layer and bottom layer. How can I create a rule to create those traces on solder layer? I am not sure which layer I need to choose neither.
The solder mask layer is a "negative", so to remove solder mask from an area, simply place any shape on desired "Top/Bottom Solder" layer.
Almost all PCB layout programs assume that the board will be produced commercially, with plated-through holes, so the programs don't make any provision for single-layer designs.
However, you could place a solid fill on the component side copper, not connected to any net, around the connector (or perhaps over the whole board). This would force the program to connect to the connector on the bottom side.
For a simple board, you may find it best to route it manually, then you have full control of where the connections are made. Even with (perhaps especially with!) complex boards, I do a lot of manual routing.
Best Answer
If you want to remove solder mask above the trace, just select all the segments of the trace and use PCB inspector to set the
Solder Mask Expantion ModetoFrom Rule.If you're not fussy about how the paste is added, you can also define paste expansion in the same place.