Hi all, I am just new into this forum. So thanks all. I just tried my pcb here and I have some issues with soldermask in bottom later. When sending my pcb to the factory, they say there is no soldermask layer. Even if I check into online gerber file I see no bottom soldermask, so the cooper is ex…

Bottom SolderMask issue

eelik December 16, 2024, 7:35pm 7

What is soldermask and how does these layers work in KiCad? Solder mask is physical substance applied to the physical board. There are holes in this mask which expose copper pads. [image] Illustration: pads and solder mask openings. In KiCad (and other EDA) the graphical layer which represents solder mask is negative. Where there is graphics in this layer, the physical solder mask isn’t applied and there will be a hole in the solder mask. Expansion and Minimum Web Width There are three val…

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