Footprint update for solder paste layers

A project log for Yet another Nokia 5110 LCD breakout board

Integrate the Nokia 5110 LCD into your own KiCad PCB design ..or then just create your own breakout board.

Sven GregoriSven Gregori 07/29/2017 at 15:080 Comments

After receiving my new re-designed PCBs for #4chord MIDI - which is a real world example of putting this project here into reality (and pictures of that are now in the gallery), I thought I'll get familiar with the whole subject of solder paste stencils. This made me finally understand what the "Paste" layers are for, and I created the Gerber files for them to have a look at it.

Yep, the footprint in my Github repository includes the solder paste layer for both the connector pads and the solder pads on the back side. This is fine - or simply doesn't matter - for PCB manufacturing. However, for stencils, this may or may not be a good thing.

Personally, after experimenting some amount with OSH Park's ENIG finished PCBs, I don't have any need for solder on the connector pads, and haven't decided yet how to deal with the pads on the back side, but will potentially stick to hand-solder them. In that case, I wouldn't want to have the pads exposed in the stencil.

This might be different for you. Or I might change my mind in the future. And sure, you can always edit the pads while designing the PCB and adjust the solder paste layer individually, but figured I add some shortcut.

So long story short, I extended the Nokia 5110 LCD footprint library to contain a total of four footprints:

Note, once again, if you are only interested to use the footprint for PCB design, it won't matter which footprint you use. This is only relevant for creating PCB stencils.