Heavy Copper PCB are printed circuit boards with 3 or more ounces of finished copper in the inner and/or outer layers.

While there is no standard definition of Heavy Copper, it is generally accepted that if 3 ounces (oz) of copper or more is used on the internal and external layers of a printed circuit board, it is called a heavy copper PCB. Any circuit with a copper thickness of more than 4 oz per square foot (ft2) is also categorized as a heavy copper PCB. Extreme copper means 20 oz per ft2 to 200 oz .

Thermal management is more important than ever today as electronics are used in demanding environments and operate at higher currents. Heavy copper PCBs (copper conductors 5 oz/ft² – 19 oz/ft² in inner and/or outer layers; sometimes defined as more than 4 oz per square foot (ft²)) can help conduct heat away from components so failure is greatly reduced. PCB manufacturers create durable wiring platforms with heavy copper. The resulting PC boards conduct electricity better and are more capable of withstanding thermal stress. These boards can be manufactured in a smaller footprint as they can contain multiple weights of copper on the same circuit layers.

The benefits of heavy copper in PCBs include:

Reduction of thermal strain
Better current conductivity
Can survive repeated thermal cycling
Smaller PCB size due to layering of copper
Increased connector site strength

KXPCBA produce heavy copper for 10 years, 2 layer can be over 20 oz, inner multi-layer   inner 4-6oz depends on the design , Welcome to send your design to sales@kxpcba.com , Get fast quote now !