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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

  • HAL

    Acronym HAL, which is the process of putting solder on exposed copper of the circuit board. Approx. 60/40 Tin/Lead mix is used. Also known as a SMOBC which is an acronym for Solder Mask Over Bare Copper.