The PCB printed circuit glossary is designed to give you definitions to some of the words and phrases you will come across in doing business with Sunstone Circuits. While not exhaustive, it provides useful information about PCB circuits, circuit board design, and circuit board construction.
The copper pad area that remains after a hole is drilled through the pad, measured from edge of hole to edge of pad. Your inner and outer layer pads should be at least 0.018" larger than the finish hole size (0.010” for vias). If your design has any pad to trace junction minimum requirement, add that to the above numbers [0.018" pad + 0.002" junction should have 0.020" pad]. This will provide a 9mil annular ring for component pins, 5mil annular ring for vias.
This is a text file describing the size and shape of each element on the PCB printed circuit boards. These are also known as D-code.
