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A layer composed of phenolic, paper composite, or aluminum foil-clad fiber composite used during fabrication to prevent Burrs and to protect the drill table.

PCB Glossary

  • Surface Mount

    The pitch of the surface mount is defined as the dimension in inches from center to center of surface mount pads. Standard pitch is >0.025″, fine pitch is 0.011″-0.025″, and ultra fine pitch is <0.011". As boards contain finer pitch, processing and test fixture costs increase.