Padstacks

Each symbol pin in a design must have a padstack associated with it. The padstack describes how the symbol pin connects to each layer in the design.

A padstack is a file that contains the following information for each layer:

• Pad size and shape
• Drill size and drill display figure

A padstack also describes the following information for the TOP and BOTTOM layers:

• Soldermask
• Pastemask
• Filmmask

A padstack can also contain Numerical Control (NC) drill data, which the layout editor uses to create drill drawings.

Related Topics

Bumps (IO pads)

Through Silicon Vias (TSVs)

Silicon Interposers

Stackup Information in Substrate

Wafer-Level Packaging

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