User:Asj/Notes about laser cutting solder stencils: Difference between revisions
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* For each QFN pad, downsize "solder paste absolute clearance" to -0.09 and produce solder mask svg | * For each QFN pad, downsize "solder paste absolute clearance" to -0.09 and produce solder mask svg | ||
* Configure Light burn to engrave at | * Configure Light burn to engrave at | ||
** 100mm/s at | ** 100mm/s at 28% | ||
** Line interval of 0.02mm | ** Line interval of 0.02mm | ||
Revision as of 14:41, 20 May 2024
Most pads are ok - perhaps a bit large.
Small pitch QFN packages are a problem. To do these,
- For each QFN pad, downsize "solder paste absolute clearance" to -0.09 and produce solder mask svg
- Configure Light burn to engrave at
- 100mm/s at 28%
- Line interval of 0.02mm
It might also be a good idea to apply this globally since other pads also end up a bit large. This can be done:
- File -> Board Setup -> Solder Mask Paste
- "Solder paste absolute clearance" -> -0.09mm