1.4. When dimensions are used in part name, they are in millimeters, decimal places separated by a dot, and unit is not mentioned. Ex: "C_Rect_L13_W4_P10"
6.1. Follows datasheet recommendation unless intentional variation, for example longer pads for hand soldering.
6.2. Pad 1 is on the left first, then at the top, except at the top for PLCC (IPC-7351).
6.3. For through-hole components, footprint anchor is set on pad 1.
6.4. For surface-mount devices, footprint anchor is placed in the middle with respect to device lead ends. (IPC-7351)
6.5. Silkscreen is not superposed to pads, its outline is completely visible after board assembly, uses 0.15mm line width and provides a reference mark for pin 1. (IPC-7351)
6.6. Courtyard line has a width 0.05mm. This line is placed so that its clearance is measured from its center to the edges of pads and body, and its position is rounded on a grid of 0.05mm.
6.7. Courtyard clearance is 0.25mm except for components smaller than 0603 at 0.15mm, connectors, SMD canned capacitors and crystals at 0.5mm and BGA at 1.0mm. (IPC-7251, IPC-7351B)
6.8. Cannot be duplicated to match a different pin ordering. This is to be handled in the symbol libraries.
7.1. Specific package feature first, not separated by anything. Ex: "TSSOP"
7.2. Package name, numbers separated from letters using hyphen. Ex: "SOT-89"
7.3. Variation of package, separated by another hyphen. Ex: SOT-23 with 5 pins: "SOT-23-5", Exposed pad under package: "QFP-48-1EP"
7.4. If it's a manufacturer-specific package, name can be appended, separated by an underscore.
7.5. Any modification to the original footprint, indicated by appending the reason. Ex: longer pads used to facilitate hand soldering of a QFN component: "QFN-52_HandSoldering"
10.2. Doc property contains a full description of footprint.
10.3. Keywords are separated by spaces.
10.4. Value is filled with footprint name and is placed on the fabrication layer.
10.5. Attributes is set to the appropriate value, see tooltip for more information.
10.6. All other properties are left to default values. (Move and Place: Free; Auto Place: 0 and 0, Local Clearance Values: 0)
10.7. 3D Shape ".wrl" files are named the same as their footprint and are placed in a folder named the same as the footprint library replacing the ".pretty" with ".3dshapes".