With the free canned PCB libraries out there, you get asolder pattern that only has features that were manually created by someone, andyou must add all the features you want in your CAD tool.

Did it come with:

• Silkscreen Outline under the package that is not visible after assembly?
• Silkscreen Outline line width that you use that are consistent with your master library?
• Visible polarity marking for post assembly inspection?
• Is the Polarity Marker the right size, shape and location you want?
• Component and Terminal Outlines so you can see exactly where they are in relation to the pad pattern?
• Terminal Outlines provide visual assistance for the solder joint goals for Toe, Heel and Side.
• Contoured Courtyard Outline that represents your internal design rules for part placement guidelines?
• Courtyard Excess for various packages may differ and range from 0.10 mm to 1.00 mm.
• Was the footprint delivered with the units you use?
• Metric, mils, inches, micrometers?
• What design rules were used for the pad size and space calculations?
• Are they consistent with all the footprints from the same vendor?
• Is the pad shape consistent with your company guidelines?
• Rectangle, Oblong, D-Shaped, Rounded Rectangle?
• Do they always have the footprint you are looking for?
• If not, will they create it for free in the time frame you need it?
• Is the footprint origin on Pin 1 or in the center or offset?
• Are the pads for low profile packages trimmed from under the package?
• Are the pad stack sizes rounded 2 (0.01) or 3 places (0.001) to match your master library?
• Does the footprint come in 3 Tiers for Least, Nominal and Maximum density levels?
• Does the footprint come with the correct solder mask oversize?
• If the footprint has a thermal tab, is the paste mask reduction 60%?
• Does the Paste Mask apertures have at least 0.20 space between them?
• Does the footprint come with a 3D model imported into it?
• Is the Zero Component Orientation (Pin 1 location) consistent with your master library?
• Is the Footprint IPC-7351B compliant or did they just make up the footprint name?
• Or did the supplier use the PCB Libraries, Inc. proprietary Footprint Naming Convention in violation of the PCB Libraries, Inc. copyright?
• If the user changes CAD tools, can they rebuild the new library in minutes?

These are just a fraction of all the things a user mustconsider when using Stock Libraries. 

V2022 Footprint Expert allows the user to set Options forall of these PCB library features for the creation of 100% consistent libraryquality.

V2022 Footprint Expert allows the user to save the packagedimensions and apply different rules for the batch creation of variouslibraries for multiple applications.