Heavy Copper PCB

A circuit board having an exterior and inner copper layer thickness of less than 3 oz per square foot is referred to as a heavy copper PCB. A circuit board’s thicker plating is what qualifies it as a heavy copper PCB. Through the use of plated holes and sidewalls, copper thickness is increased during the manufacture of heavy copper PCB. Heavy copper PCB is regarded as a trustworthy wiring choice. Extreme copper PCB, which ranges in weight from 20 to 200 oz per square foot, is distinct from heavy copper PCB.


  • Enhanced resistance to thermal stresses.
  • The current carrying capacity was increased.
  • Increased mechanical strength in PTH holes and at connecting locations.
  • Full utilization of exotic materials without circuit failure.
  • By placing several copper weights onto the same layers of circuitry, the product size was decreased.
  • Heavy copper-plated vias help transport heat to an exterior heatsink and carry a larger current through the board.
  • On-board heatsinks are immediately plated utilizing up to 120-oz copper planes onto the board surface.
  • High-power density planar transformers built-in


Each layer of a heavy copper PCB has at least 4 ounces of copper. Heavy Copper PCBs have a substantially higher heat-sink capacity than regular PCBs. The creation of a strong and durable circuit depends absolutely on heat sinking. Improper heating signal handling affects the functionality of electronics and shortens the life of the circuitry.

The manufacture of hefty copper PCBs frequently uses plating or etching. The basic goal is to provide sidewalls & plated holes with more copper thickness. The techniques utilized to create thick copper PCBs are not unrealistic. To ensure the additional copper thickness on heavy copper PCBs, specific etching and plating techniques are required.


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