Scribbles for now:
As you check the footprint, fill out the spreadsheet below. Also fill in the tradeoffs spreadsheet.
https://docs.google.com/spreadsheets/d/1AQArIgGLe-hWAkbBj9IDUikQwnTt2Hak--EqBBlPKGo/edit#gid=0
Pads
Number of pads
Pad order (check the datasheet)
Pad size (check the datasheet)
Pitch (datasheet)
Paste
Click top paste layer and make sure all pads are covered.
Check center pad!
Solder Mask
Make sure slivers are >0.1mm
Thermal Vias
If there’s a big center pad check or other heat sink check that there are vias
Check the datasheet
Overlay/Silk Screen
Check there’s an outline (can be just corner indications)
Make sure pin 1 is indicated (dot, diagonal works)
Width of tracks should be at least 4 mil (0.1 ish mm)
Make sure there’s at least 5 mil (0.127mm) between overlay tracks and solder mask. So between yellow and purple
Assembly Drawing (mechanical layer 4)
Outline
Text
Typically have the designator, so U? or J? or something else
And have the name of the component, don’t need the whole thing you can just do IMU, CPU, etc.
Pin 1
Put a dot in the corner
3D Model (mechanical layer 13?)
Make sure there’s at least a block
Make sure the height is the max height given in datasheet
Courtyard (mech layer 3 i believe)
Outline + crosshair make sure they exist
Holes
Plating + size
To check the schematic:
Pins should have the name inside, the number outside the box.
To rotate a pin select it and press spacebar
Make sure they’re all labeled correctly
Default electrical type is passive, but if you’re sure about if it’s VCC, ground, stuff like that (which you can find in the datasheet), indicate its electrical type as input, output, power, i/o, etc.
Work in progress...
Info
Component
- Put in the full name of the component (nickname, type, perhaps short description)
Board
- Which board(s) does it go on
Footprint
- The name of the part in the library (and the part library), which should be the full manufacturer part number