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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 PCB. 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 PCB. 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 PCB delineates a printed circuit board showcasing a copper weight equivalent to 6 ounces for each square foot (oz/ft²) or roughly 213.6 grams for each square meter (g/m²). To put it in context, the copper weight in a PCB alludes to the thickness or the quantity of copper integrated on the surface of the board.

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 undergoes etching to achieve the required circuit pattern, with surplus copper eliminated. This leaves behind the essential copper traces, serving as a conduit connecting the diverse components populated 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, like 6oz, are typically used in applications that require high power or high current handling capabilities

A 6oz PCB exceeds the performance of boards with lesser copper weights when it comes to managing greater current flows. This superior efficacy arises from the higher copper thickness augmenting heat dissipation and lower resistance. These PCBs frequently used in configurations like power electronics, high-power amplifying systems, and motor controls, along with other high-current requirements, all of which call for substantial electrical performance.

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?

In a 6oz PCB, the dielectric material denotes the non-conductive foundational material purposed to segregate the copper layers and ensure insulation therein. The optimal dielectric material is contingent upon an array of determinants 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 PCB. It is a glass-fortified epoxy laminate that extends desired electrical insulation attributes, structural durability, alongside economic viability. 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 types are used. These materials display enhanced thermal steadiness and exhibit resilience under intensified temperatures, without any considerable deterioration in electrical performance.

Polyimide (PI):

Polyimide functions as a pliable dielectric material routinely employed in applications necessitating flexibility, including in the use case of FPCB (Flexible PCB). It provide to the table commendable thermal stability, superior electrical insulation qualities, and displays defiance towards chemicals and moisture. Polyimide-base materials are frequently used in sectors such as aerospace, automotive, and medical.

PTFE (Polytetrafluoroethylene):

Materials based on PTFE, Teflon being a popular example, are applauded for their superior electrical attributes, low dielectric constant, and optimized high-frequency performance. They extend a low loss tangent, elevated insulation resistance, plus excellent thermal stability. Applications involving high-frequency and microwave commonly leverage PTFE-centric materials for their needs.

Rogers Materials:

Rogers Corporation is a recognized producer of an array of advanced performance dielectric substances, expressly engineered for high-frequency applications. Their product lines, notably the RO4000 series or the RO3000 series, provide beneficial properties including low dielectric loss, signal integrity and enhanced 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. Holding conversations with a PCB fabricator or designer will aid in pinpointing the most apt dielectric materials to utilize in a 6oz PCB board, driven by the demands of the application.

How do You Make 6oz PCB?

When utilizing 6 oz copper PCB, 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. Following this, the PCB should be submerged in a solution of ferric chloride, which aids in conducting the etching procedure. This solution proficiently eliminates any revealed segments of the 6 oz copper PCB, resulting in a precisely delineated 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:

With the objective of designing a PCB possessing an advanced copper weight, it is vital to examine the amplified thickness and weight of the copper traces. This factor influences different facets of the design, including trace width, spacing, and the dimensions of the via.

Trace Width and Space:

A higher copper weight demands broader traces to accommodate the intensifying current-carrying capacity. The design recommendations proposed by the PCB manufacturer must be adhered to in order to determine the suitable trace width and separation, contingent on the specific copper weight.

Thermal Considerations:

An escalated copper weight culminates in enhanced power dispersion and augmented heat generation. Sufficient thermal handling strategies, such as thermal vias, heat sinks, and judicious positioning of components, must be instituted to guarantee proficient 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:

The design of a 6oz PCB necessitates rigorous cooperation with the PCB fabricator, as they can offer distinct design criteria, fabricating proficiencies, and potential restraints that should be taken into account throughout the design operation.

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 PCB?

In terms of 6 oz copper PCB, a variety of optimal surface finishes exists that are capable of boosting work performance and safeguarding the copper surface. Here are some commonly used surface finishes for 6 oz copper PCB:

Immersion Gold (ENIG): ENIG is a prevalent surface finish providing superior solderability and resistance against corrosion. It embodies a lean coating of gold atop a layer of nickel. ENIG guarantees a level, sleek surface, amplifies the reliability of the solder joint and delivers excellent electrical conductance.

Electroless Nickel/Immersion Gold (ENIPIG): ENIPIG mirrors the character of ENIG but incorporates an additional layer of electroless nickel situated between the layers of copper and gold. This surface finish contributes towards superior wire bonding attributes, an increase in resilience and outstanding resistance to corrosion.

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. This technique imparts superior resistance against corrosion, ensures reliable solderability, and establishes a dependable contact surface apt for wire bonding. Predominantly, soft gold sees use in applications demanding recurrent wire bonding activities.

The decision on the appropriate surface finish for 6 oz copper PCB is contingent on the unique requisites of the application in question – ranging from solderability, wire bonding, environment-specific factors to cost considerations. It is important to consult with the PCB manufacturer and consider the intended use and assembly processes to ascertain the most fitting surface finish for your 6 oz copper PCB.

What are The Benefits 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 PCB 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 PCB are generally more expensive, 6 oz copper PCB provide impressive efficiency at a competitive cost. The materials used in these PCB 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 PCB 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 stack up benefits from the use of 6oz copper. These include impedance control, strategic component placement, balanced weight distribution, and efficient heat conduction. With 6oz copper PCB, a broad spectrum of dielectric constants become available due to the employment of specific dielectric materials, providing excellent impedance control across diverse layers. The notable thickness of the copper accommodates components of different weights with ease, and promotes favorable heat mitigation through vias. As a result, 6oz copper PCB is well-suited for multilayer PCB stack up, ensuring optimal performance and reliability.

Why 6oz PCB Better when Compared to the Standard?

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

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

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

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

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

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

Which Optimal Mounting Technology for 6 oz Copper PCB?

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

Through-Hole Technology:

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:

Surface Mount Technology is an effective technique for installing petite-sized PCB elements. This process involves the placement of components onto designated regions, followed by a soldering operation to lock them in place, fabricating uninterrupted and enduring electrical unions. SMT has a well-regarded reputation for excelling in environments demanding high-speed data transmissions.

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


6 oz copper PCB 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 PCB, 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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