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Circuit board pad layout.

thread286-1657

Circuit board pad layout.

Circuit board pad layout.

(OP)
What are the possible manufacturing issues and drawbacks involved in using a pad layout that is exactly the same dimensions as the
maximum tolerance of the footprint of the device being installed?  Can I get away with having a 7% overhang of the interior "heel" of the surface mount part relative to the pad?  Why should I follow an IPC recomended pad layout that takes up so much of my board space when the device will fit snug on a smaller layout?

RE: Circuit board pad layout.

You want to make sure that you have an adequate heel fillet (as well as toe fillet). Your main concern should be for the heel fillet.

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