KLC F5.3

Courtyard layer requirements

The component courtyard is defined as the smallest rectangular area that provides a minimum electrical and mechanical clearance around the combined component body and land pattern boundaries. It is allowed to create a contoured courtyard area using a polygon instead of a simple rectangle. (IPC-7351C)

The courtyard should include any extra required clearance for mating connectors (for example).

KiCad refers to the courtyard layers as:

  • F.CrtYd - Front courtyard layer

  • B.CrtYd - Back courtyard layer

A fully enclosed Component courtyard must be drawn on the F.CrtYd layer, with the following parameters:

  1. Courtyard uses 0.05mm line width

  2. All courtyard line elements are placed on a 0.01mm grid

  3. If the component requires a courtyard on the back of the PCB, a corresponding courtyard must be provided on the B.CrtYd layer.

Courtyard clearance should adhere to the following requirements:

  1. Unless otherwise specified, clearance is 0.25mm

  2. Components smaller than 0603 should have a clearance of 0.15mm

  3. Connectors should have a clearance of 0.5mm, in addition to the clearance required for mating of connector

  4. Canned capacitors should have a clearance of 0.5mm

  5. Crystals should have a clearance of 0.5mm

  6. BGA devices should have a clearance of 1.0mm

Example for courtyard clearance when applied to the contoured courtyard outline of a QFP-64 package. (Shown are courtyard, fab-outline and copper pads.)

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