Weight and thickness of heavy copper PCB

Supply Heavy Copper PCB

Copper is a great conductor for electricity, which means that it can handle high-current/high-power circuits and control circuits on the same board. Thick-Copper technology offers the possibility to implement complex switches in limited space in combination with circuitry for high current levels.

Read on to learn more about weight and thickness of heavy copper PCB.

What are the advantages of heavy copper PCB?

The main benefit of heavy copper PCB is the capability to support frequency to excessive current, elevated temperatures and recurring thermal cycling, which can do harm to aregular circuit board in seconds. What’s more, there is a great demand for heavy copper PCBs in the computer, automotive, military, and industrial controls.

In additions, the heavy copper PCB board is also used in other purposes: In addition, there are some other benefits of heavy copper PCB as follows:

1. Compact product size because of several copper weights on the same layer of circuitry.

2. Onboard high-power-density planar transformers.

3. Heavy copper-plated vias pass the elevated current through the PCB and are good for transferring the heat to an outer heat sink.

Benefits of Heavy Copper PCBs

Supply Heavy Copper PCB

1. Elimination of complex wired buss configurations
2. Increased current carrying capacity
3. Increased endurance to thermal strains
4. Optimized use of exotic high temperature materials with lower Probability of circuit failure
5. Ability to incorporate multiple copper weights on the same layer of circuitry (layer count reduction)
6. Added copper plating in the heat vias (thermal resistance reduction)
7. Selective areas plated with heavy copper can function as a heat sink or interface to cold plate (built-in heat sinks)
8. Integration of high-current circuits and control circuits on a single PCB

Weight and thickness of heavy copper PCB

The current carrying capacity of a PCB is determined by the thickness of its copper traces and, therefore, of the copper layer. The standard copper thickness used in PCB production is 1 oz. Generally, the copper thickness is referenced to in ounces. What is the relationship between copper weight and thickness? The measure of copper thickness is when a specific weight of copper is rolled to occupy 1 square foot. So, if 1 oz. of copper is rolled out to have an area of 1 square foot; the resulting foil thickness will be 1.37 mils or 0.0348 mm.

Final thoughts

Reliable performance and excellent thermal management is the main driver behind the demand of copper PCBs. Depending upon the design requirement, heavy copper PCBs are more expensive to produce than regular PCBs. Hence, the more complicated the design, the more it will cost to produce a heavy copper PCB.


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