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- solder paste - Sane default for Altium pastemask expansion . . .
1: In Altium Designer a negative paste mask expansion means the hole in the paste mask is smaller than the pad dimensions I usualy start with zero 2a: To little paste causes weak joints and 2b: Too much paste escapes across the board causing solder balls which short things out
- pcb - What is the purpose of solder mask expansion? - Electrical . . .
If your solder mask expansion is too small, then these misalignments cause the solder mask to partially or completely overlap SMT pads and through-hole pads If the solder mask completely covers most or all of the pad, the SMT part will be completely disconnected from that pad Then the board will immediately fail the end-of-line go-nogo test
- Solder Paste and Solder Land in Altium Designer CircuitStudio
In order to automatically achieve this, Altium uses the "Paste Mask Expansion" property for the pad in the library Altium interprets the value as the expansion if positive, or pull back if negative, from all edges In order to achieve 0 1mm smaller solder paste than the copper pad, the Paste Mask Expansion value needs to be set to -0 05mm
- What is the difference between Solder mask expansion and Solder mask . . .
A positive value means that the solder mask will cover a larger area than the copper, while a negative value means that the solder mask will be smaller than the copper The purpose of the solder mask expansion is to ensure that there is enough solder mask material between adjacent copper features to prevent shorts and other assembly problems
- How to implement NO solder paste pad in Altium
It's Tag-Connect The reason you might not be able to find instructions is because it's trivial if you know what a solder mask is supposed to do Just remove the solder mask in the padstack used for the pin No solder mask = no hole in the soldermask = no solder applied \$\endgroup\$ –
- Altium Designer : How to make a custom Top paste for D2PAK pad
Select and delete the existing region on the Paste layer, and select "Place" --> "Region" (or whatever object you like), draw your custom shape, then press complete (or Shift+C) You can also right click on an object such as a "Region" on the paste layer, and select "Pad Actions" --> "Add selected custom masks to pad" and then select the pad to
- How does Altium designer decide the size of the solder mask?
According to Creating a PCB Footprint in Altium Designer: "Altium Designer automatically adds solder and paste masks to pad objects based on their shape Default expansion values are defined by design rules by default, although they can also be specified by the Pad settings contained on the PCB Editor - Defaults page of the Preferences dialog
- Best way to remove paste in pad footprint in Altium
So, I have to switch to manual paste mask expansion and put -999 mils into value to be sure it disappear For me it's a mistake bug from Altium Because it have no sense to have paste on a pad without any window on top solder mask on it to received So does not a tented pad should automatically disable the associated paste for this external
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