Is it legal of solder mask expansion ove

Is it legal of solder mask expansion overlap?

7/11/2016 10:05:34 PM

solder mask

I used the component wizard in Altium to automatically create a footprint but it decided to overlap the solder mask expansion with neighboring pads. Is this OK or should I change it such that there is a gap between each pad.

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sangngean4

11/16/2016 4:53:25 AM

The overlap is not a problem as far as having the PCB green-board made. There will just be no soldermask everywhere you see the purple. This could be a problem when you have the boards populated, because solder bridging is more likely.

neil.edlin

10/16/2016 7:37:48 PM

When the pads are closer together than the manufacturing process can handle, there is no other way. Especially for 0.4mm pitch and similar really fine pitches. It probably makes shorts between pins a bit more likely, so check capabilities of your board h

fbrown541

7/13/2016 10:05:34 PM

A good piece of info for learning.

Is it legal of solder mask expansion overlap?

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