What is Heavy Copper PCB?

high current pcb

Heavy Copper PCBs are fabricated with 4 or more ounces of copper on each layer. 4 oz Copper PCBs are most commonly used in commercial products. The copper concentration can be as high as 200 ounces per square foot. Heavy Copper PCBs are widely used in electronics and electrical circuitry where high power transmission is needed. Furthermore, the thermal strength offered by these PCBs is impeccable. In many applications, especially electronics, the thermal range is of vital importance since high temperature is devastating for sensitive electronic components and badly affects circuit performance.

The heat sinking capacity of Heavy Copper PCBs is much higher as compared to casual PCBs. Heat sinking is vitally essential for the development of a robust and durable circuit. Poor handling of heat signals not only affects electronics performance but also shortens the life of circuitry.


High power circuit wirings can be developed using Heavy Copper PCBs. Such a wiring mechanism offers more reliable thermal stress handling and offers fine finishing while incorporating multiple channels on a single layer of a compact board.


Heavy Copper PCBs are widely used in various products as they provide multiple features for improving circuit performance. These PCBs are widely used in high power equipment such as transformers, heat sinking, power inverters, military equipment, solar panels, automotive products, welding plants, and power distribution systems.


Heavy Copper PCB Manufacturing


Just the way standard PCBs are manufactured, Heavy Copper PCBs are manufactured, though they require more delicate handling.

Traditional Heavy Copper PCBs were manufactured using obsolete techniques which caused uneven tracing and undercutting on PCBs, resulting in low efficiency. However today, modern manufacturing techniques support exquisite cutting and minimal undercuttings.


Thermal Stress handling quality of Heavy Copper PCBs


When a circuit is being designed, factors such as thermal stress are of vital interest and engineers strive to erupt thermal stress as much as possible.

With the passage of time, PCB manufacturing procedure has evolved, and various PCB technologies such as Aluminium PCBs have been invented that are capable of handling thermal stress.


Minimization of power budget while preserving circuit performance and environmentally friendly design with thermal sinking quality is what interests designers in Heavy Copper PCBs.


Since the overheating of electronic components can result in failures and even life-threatening hazards, thermal management cannot be neglected.

The conventional procedure of achieving heat sinking quality is using external heat sinks, connected with the heat producing components. Since the heat producing components approach high temperature if the heat is not dissipated, in order to dissipate this heat, the heat sinks consume heat from the component and transfers in surroundings. Usually, these heat sinks are made of copper or aluminum. The use of these heat sinks not only exceeds development cost but also demands more space and time. While the result is not even close to the heat sinking capability of Heavy Copper PCBs.

In Heavy Copper PCBs, the heat sinks are printed on the board during manufacturing, rather than using any external heat sink. There is less limitation for the placement of heat sink as the external heat sinks require more space.


Since the heat sinks are electroplated on the board and are connected with the heat sources using conductive vias rather than using any interfaces and mechanical joints, the heat is transferred speedily, hence improving heat dissipation time.


The heat vias in Heavy Copper PCBs enables more heat dissipation as compared to other technologies since the heat vias are developed with copper. Furthermore, the current density is improved, and the skin effect is minimized.


Advantages of Heavy Copper PCBs:

pcb copper thickness

The advantages of Heavy Copper PCBs makes them top priority for the development of high power circuits. Heavy Copper concentration is capable of handling high power and heat and that is why circuits flowing high power are developed using this technology. Such circuits cannot be developed using low copper concentrated PCBs as they cannot stand high currents and immense thermal stress developed by flowing current. Heavy Copper PCBs are often addressed as high current PCBs due to their remarkable heat sinking capability.

The PCB copper thickness vs. current is an essential factor for the use of Heavy Copper PCBs. As the copper concentration is increased, so does the overall cross-sectional area of copper which reduces resistance in the circuit. As we know  losses are devastating for any design, the copper concentration enables these PCBs in reducing power budget.

Current conductivity is an important factor especially when low power signals are being handled, and with the use of Heavy Copper PCBs, current conductivity is boosted as their resistance is minimal.

Connectors are essential in circuit when it comes to jumping connections. However, connectors are often difficult to be maintained on conventional PCBs. Since casual PCBs offer low strength, the connector site is often affected in case of mechanical stress, but Heavy Copper PCBs offer higher strength, ensuring more reliability.


Heavy Copper PCB manufacturing at RAYMING


Heavy Copper PCB manufacturing demands proper care, and inappropriate handling during manufacturing process can lead to poor performance, always consider services of an experienced manufacturer.


RAYMING offers executive PCB manufacturing facilities for various types of PCBs. RAYMING has specialized in Heavy Copper PCB manufacturing over the last 10 years and developed an image for high-quality production.


The Heavy Copper PCBs are manufactured on advanced automated machines, which allows us to develop highly reliable PCBs. So far we have developed two layer PCBs with up to 20 ounces and multilayer PCBs with 4-6 ounces copper weight.


RAYMING has assisted clients from diverse industries in development of complex designs with proper functionalities. We have always exceeded expectations of our clients in terms of quality and reliability.


Our services are not limited to only manufacturing, our team is dedicated to provide tested products and ensure customer satisfaction. RAYMING frequently upgrades its PCB testing tools and procedures for quality services. Each product is thoroughly tested for required functionalities and durability.


If you are looking for a Heavy Copper PCB manufacturer, RAYMING offers complete solutions that you need for your PCB development.

Willing to place an order or got any queries? Contact us and get an exciting quotation for your Heavy PCB manufacturing.

Our customer support team can be reached shortly at sales@raypcb.com for any queries.