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Add WLCSP-8 1.58x1.63mm package (for Adesto Flash)

KiCad Bot requested to merge github/fork/DanSGiesbrecht/wlcsp-8 into master

Created by: DanSGiesbrecht

Created a footprint for Adesto Technologies AT25DF041B-Uxx Flash.

The datasheet can be found here.

Travis Warnings/Errors, Design Choices:

  • Choice: I chose to use a soldermask opening of 0.03mm (rather than 0mm/global settings) to specify Not-Soldermask-Defined (NSMD) pads, which is part of the footprint name.
  • Travis: Silkscreen lines are not using the nominal width of 0.12mm
    • Choice: I'm using width of 0.1mm (deemed acceptable via KLC for high-density designs)
  • Travis: The 3D model format is incompatible.
    • Choice: I believe .step files are permitted now. If this is incorrect, I will change the filename.
    • Note: Currently, Package_CSP.3dshapes doesn't exist. I plan on addressing this in the future, upon my own need for a 3D model for this part.

Part Screenshots:

image (source: https://www.digikey.ca/product-detail/en/AT25DF041B-UUN-T/1265-1222-1-ND/6003015/?itemSeq=269592529#images)

image (source: excerpt from the datasheet, page 50)

Footprint Screenshots:

image

image

  • Provide a URL to a datasheet for the footprint(s) you are contributing
  • An example screenshot image is very helpful
  • If there are matching symbol or 3D model pull requests, provide link(s) as appropriate
  • Check the output of the Travis automated check scripts - fix any errors as required

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