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6 Oz Copper PCB

Jarnistech > Heavy Copper PCB > 6 Oz Copper PCB
6 Oz Copper PCB

When it comes to electronic devices, the issue of carrying high currents can often be a challenge. However, a viable solution to this problem is the utilization of 6 oz copper PCBs. This specific copper thickness is well-suited for maximizing the current-carrying capacity of PCB applications.

In the present times, JarnisTech has emerged as the most dependable manufacturer of 6 oz copper PCBs. By referring to this comprehensive FAQ guide, you will gain a clear understanding of the optimal thickness required for the PCB surface. Let us commence our exploration of this topic.

What is 6oz Circuit Boards?

A 6oz circuit board refers to a printed circuit board (PCB) with a copper weight of 6 ounces per square foot (oz/ft²) or approximately 213.6 grams per square meter (g/m²). The copper weight of a PCB refers to the thickness or amount of copper present on the board’s surface.

In PCB manufacturing, copper is laminated onto the substrate material (usually a non-conductive material like fiberglass or FR-4) to create conductive pathways for electrical signals. The copper is etched to create the desired circuit pattern, and the excess copper is removed, leaving behind the copper traces that connect the various components on the board.

The copper weight of a PCB is specified in ounces per square foot and is an important factor in determining the board’s current-carrying capacity and overall electrical performance. Higher copper weights, such as 6oz, are typically used in applications that require high power or high current handling capabilities.

A 6oz circuit board can handle larger currents compared to lower copper weight boards, as the increased copper thickness allows for better heat dissipation and lower resistance. These boards are commonly used in applications such as power electronics, high-power amplifiers, motor control systems, and other high-current applications where robust electrical performance is required.

Designing and manufacturing a 6oz circuit board may require specific techniques and considerations to ensure the board’s integrity, thermal management, and electrical performance. Working with an experienced PCB manufacturer or designer is advisable to ensure the successful implementation of a 6oz circuit board design.

What Dielectric Materials of 6OZ PCB Board?

The dielectric material used in a 6oz PCB board refers to the non-conductive substrate material that separates the copper layers and provides insulation between them. The choice of dielectric material depends on various factors, including the specific application requirements, electrical performance, thermal considerations, and manufacturing constraints.

Commonly used dielectric materials for 6oz PCB boards include:

FR-4 (Flame Retardant 4):

FR-4 is the most widely used dielectric material for PCBs. It is a glass-reinforced epoxy laminate that offers good electrical insulation properties, mechanical strength, and cost-effectiveness. FR-4 is suitable for many applications and is available in different grades to meet specific requirements.

High-Temperature FR-4:

For applications that involve high-temperature environments or elevated operating temperatures, high-temperature FR-4 variants are used. These materials have improved thermal stability and can withstand higher temperatures without significant degradation in electrical performance.

Polyimide (PI):

Polyimide is a flexible dielectric material that is often used in applications requiring flexibility, such as flexible PCBs (FPCBs). It offers good thermal stability, excellent electrical insulation properties, and resistance to chemicals and moisture. Polyimide-based materials are commonly used in aerospace, automotive, and medical applications.

PTFE (Polytetrafluoroethylene):

PTFE-based materials, such as Teflon, are known for their excellent electrical properties, low dielectric constant, and high-frequency performance. They offer low loss tangent, high insulation resistance, and good thermal stability. PTFE-based materials are commonly used in high-frequency and microwave applications.

Rogers Materials:

Rogers Corporation manufactures a range of high-performance dielectric materials specifically designed for high-frequency applications. These materials, such as Rogers RO4000 series or RO3000 series, offer low dielectric loss, excellent signal integrity, and high thermal stability.

It’s important to note that the choice of dielectric material depends on the specific requirements of the PCB design, including frequency, power, signal integrity, thermal considerations, and cost. Consulting with a PCB manufacturer or designer can help determine the most suitable dielectric material for a 6oz PCB board based on the application’s needs.

How do You Make 6oz PCB?

When utilizing 6 oz copper PCBs, one can expect a stable component placement on the surface through soldering. It is crucial to handle the fabrication process with utmost care, which involves etching and plating.

To begin, the desired copper surface area should be covered with a photopolymer, acting as a protective layer. Subsequently, the PCB needs to be immersed in a ferric chloride solution to facilitate the etching process. This solution effectively removes any exposed portions of the 6 oz copper PCB, ensuring a well-defined circuit.

During the etching process, it is important to avoid applying electrostatic spray, as it can interfere with the desired results. Following etching, the substrate of the 6 oz PCB should be filled using a solder mask, which is then covered with a solder resist.

By executing this fabrication process accurately, the efficiency of the PCB can be significantly enhanced. A well-fabricated 6 oz copper PCB is capable of reliably handling high-power tasks and projects, ensuring optimal performance.

Which Techniques Used for Designing 6oz PCB?

Designing a 6oz PCB (printed circuit board) involves specific techniques to handle the increased copper weight. Here are some techniques commonly used for designing a 6oz PCB:

Copper Weight Considerations:

When designing a PCB with a higher copper weight, it’s important to consider the increased thickness and weight of the copper traces. This affects various aspects of the design, such as trace width, spacing, and via sizes.

Trace Width and Spacing:

With a higher copper weight, wider traces are required to handle the increased current carrying capacity. The design guidelines provided by the PCB manufacturer should be followed to determine the appropriate trace width and spacing based on the specific copper weight.

Thermal Considerations:

A higher copper weight leads to increased power dissipation and heat generation. Adequate thermal management techniques should be implemented, such as thermal vias, heat sinks, and proper placement of components to ensure efficient heat dissipation.

Via Design:

Vias play a crucial role in connecting different layers of the PCB. With a 6oz copper weight, larger diameter vias are typically used to handle the increased current flow. Additionally, the number and placement of vias should be optimized for efficient electrical and thermal performance.

PCB Stackup:

The PCB stackup should be carefully designed to accommodate the increased copper weight. The number and thickness of copper layers, dielectric materials, and overall board thickness should be selected to meet the electrical and mechanical requirements of the design.

Manufacturing Considerations:

Designing a 6oz PCB requires close collaboration with the PCB manufacturer. They can provide specific design guidelines, manufacturing capabilities, and limitations that need to be considered during the design process.

It’s important to note that designing a 6oz PCB requires expertise and experience in high-power and high-current applications. Working closely with a professional PCB designer or manufacturer is recommended to ensure a successful design.

What Type of Optimal Surface Finishes for 6 oz Copper PCBs?

For 6 oz copper PCBs, there are several optimal surface finishes that can be used to enhance performance and protect the copper surface. Here are some commonly used surface finishes for 6 oz copper PCBs:

Immersion Gold (ENIG):

ENIG is a widely used surface finish that provides excellent solderability and corrosion resistance. It consists of a thin layer of gold over a layer of nickel. ENIG ensures a flat, smooth surface, improves the solder joint reliability, and offers good electrical performance.

Electroless Nickel/Immersion Gold (ENIPIG):

ENIPIG is similar to ENIG but with an additional layer of electroless nickel between the copper and gold layers. This surface finish provides better wire bonding capabilities, increased durability, and excellent corrosion resistance.

Organic Solderability Preservative (OSP):

OSP is a surface finish that uses a thin organic coating to protect the copper surface. It offers good solderability and flatness while being cost-effective. OSP is environmentally friendly and suitable for applications with lower lead-free soldering temperatures.

Electroplated Soft Gold:

Soft gold plating is a surface finish that uses a layer of soft gold to protect the copper surface. It provides excellent corrosion resistance, good solderability, and a reliable contact surface for wire bonding. Soft gold is commonly used in applications where repeated wire bonding is required.

The choice of surface finish for 6 oz copper PCBs depends on the specific requirements of the application, such as solderability, wire bonding, environmental considerations, and cost. It is important to consult with the PCB manufacturer and consider the intended use and assembly processes to determine the most suitable surface finish for your 6 oz copper PCB.

What Are The Benefts Of 6 Oz Copper PCB?

The utilization of a 6 oz copper PCB enhances the performance of a project, offering several significant benefits:

Current Carrying Capacity:

The increased copper thickness improves the current carrying capacity of electric circuits, making it ideal for high-load PCB applications. This feature is particularly advantageous in industrial equipment and communication devices, as it promotes efficient signal transmission.

Thermal Management:

A thick copper PCB, such as a 6 oz variant, facilitates effective heat dissipation from the PCB layers. The use of suitable dielectric materials ensures temperature control, allowing the PCB to operate at high temperatures without compromising performance quality. Additionally, the utilization of thermal vias and high Tg dielectric materials like FR4 enhances heat distribution and overall device performance.

Environmentally Friendly:

6 oz copper PCBs contain low levels of halogens, such as chlorine and fluorine, minimizing their adverse effects. Furthermore, they support lead-free mechanisms, making them environmentally friendly options for PCB applications.


While thick copper PCBs are generally more expensive, 6 oz copper PCBs provide impressive efficiency at a competitive cost. The materials used in these PCBs are highly effective, allowing for a favorable trade-off between cost and effectiveness.


The materials employed in 6 oz copper PCBs enhance their durability by mitigating mechanical and thermal stress. This robustness provides a solid foundation for PCB components, ensuring long-lasting performance and offering increased tolerance to various conditions.


6 oz copper PCBs contribute to the development of high-volume PCB applications by facilitating easy and reliable soldering processes for different materials. This feature enables the handling of complex circuits with ease, making them suitable for demanding applications.

Therefore, the utilization of a 6 oz copper PCB offers improved current carrying capacity, efficient thermal management, environmental friendliness, cost-effectiveness, durability, and enhanced functionality for high-volume PCB applications.

Is 6oz copper suitable for multilayer PCB stackup?

A multilayer PCB stackup benefits from the use of 6oz copper. It offers advantages in terms of impedance control, component placement, weight distribution, and heat conduction. The dielectric materials used in 6oz copper PCB provide a wide range of dielectric constants, enabling effective impedance control across different layers. The substantial copper thickness supports the placement of components with varying weights and facilitates efficient heat dissipation through vias. Consequently, 6oz copper PCB is well-suited for multilayer PCB stackup, ensuring optimal performance and reliability.

Why 6oz PCB Better when Compared to the Standard?

The superiority of 6 oz copper PCBs becomes evident when compared to standard thickness printed circuit boards. This superiority can be observed from various perspectives.

Enhanced Current Transfer Efficiency: 6oz copper PCBs excel in transferring high currents compared to standard PCBs.

Superior Mechanical Strength: The increased thickness of 6oz PCBs provides improved mechanical strength, offering better resistance against external forces compared to standard PCB thicknesses.

Impressive Heat Conduction: 6oz copper PCBs exhibit superior heat conduction capabilities, surpassing those of standard PCBs.

Convenient Component Placement: 6oz PCBs provide more convenient and efficient component placement options compared to standard PCBs, thanks to their ample flat surfaces.

Enhanced Impedance Control: The thickness of 6oz PCBs contributes to enhanced impedance control between layers, whereas standard PCBs struggle to achieve similar resistance enhancement.

Which Optimal Mounting Technology for 6 oz Copper PCBs?

Optimal Mounting Technologies for 6 oz Copper PCBs

When it comes to mounting components on your 6 oz copper PCB, two commonly used technologies are through-hole technology (THT) and surface mount technology (SMT).

Through-Hole Technology (THT):

THT involves inserting the leads of PCB components into holes on the PCB surface. While this method provides reliable connections, it is relatively expensive and involves a more complex assembly process compared to surface mounting.

Surface Mount Technology (SMT):

SMT is suitable for mounting small-sized PCB components. In this method, components are placed on designated pads and soldered in place, creating permanent and seamless electrical connections. SMT is particularly well-suited for high-speed data transmissions.

Both THT and SMT offer viable options for mounting components on 6 oz copper PCBs, with each technology having its own advantages and considerations to be taken into account during the assembly process.


6 oz copper PCBs have emerged as a reliable solution for enhancing device performance by delivering optimal electrical circuit output. The versatile advantages offered by this copper thickness enable the design of exceptional projects.

At JarnisTech, we consistently provide top-notch manufacturing services. In our comprehensive FAQ guide, we have meticulously explained the intricacies of 6 oz copper PCBs, ensuring a smooth PCB assembly process. We are confident that you will not encounter any difficulties. For any additional inquiries, please don’t hesitate to contact us and stay updated with our latest developments.

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