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10 Oz Copper PCB

Jarnistech > Heavy Copper PCB > 10 Oz Copper PCB
10 Oz Copper PCB

With the continuous advancement of electronics, there is a growing demand for high-performance printed circuit boards (PCBs) that can handle higher currents and heat loads. This has led to the need for ultra-high performance PCBs using 10 oz copper thickness. However, the fabrication of reliable 10 oz copper multilayer boards presents significant challenges. Therefore, it is crucial for electronics engineers to select an experienced PCB manufacturer who possesses proven expertise in 10 oz technology. Such a partnership ensures flawless quality and optimal performance.

This article aims to provide electronics engineers with a comprehensive overview of the capabilities of 10 oz copper PCBs, along with the manufacturing process requirements, quality benchmarks, and the advantages of collaborating with a reputable supplier of high-quality 10 oz boards.

What Is 10 Oz Copper PCB?

The 10 oz copper PCB stands as a valuable solution for effectively handling high current loads within electric circuits. Characterized by its substantial copper weight of 10 ounces, equivalent to a thickness of 14 mils, this PCB variant excels in optimizing thermal management capabilities. When compared to standard thinner PCBs, its increased weight enhances functionality. Notably, thick copper PCBs are recognized for their superior electrical conduction properties.

 Some standard thicknesses are:

●1 oz – 1 oz/ft2 (35 μm)
●2 oz – 2 oz/ft2 (70 μm)
●4 oz – 4 oz/ft2 (140 μm)
●6 oz – 6 oz/ft2 (210 μm)
●10 oz – 10 oz/ft2 (350 μm)

Therefore, 10 oz copper PCB refers to a printed circuit board that includes 10 ounces of copper foil per square foot on each metal layer. In terms of thickness, it can be approximated that 10 oz copper is equivalent to approximately

●350 μm (0.35 mm)
●14 mils

By employing a 10 oz copper PCB, the overall production cost can be optimized without compromising performance. Consequently, electronic applications utilizing this thick PCB variant deliver a premium experience, ensuring a high level of quality and reliability.

What Are The Materials Of 10 Oz Copper PCB?

A 10 oz copper PCB comprises various dielectric materials that play important roles in its construction. Commonly used dielectric materials for 10 oz copper PCBs include FR-4, CEM1, CEM3, among others.

FR-4 materials are highly effective and widely used in PCB projects. They offer a cost-effective solution and are environmentally friendly due to their lead-free composition. These materials ensure that PCBs maintain their electrical and thermal characteristics, allowing for precise control of the prepreg in the copper PCB. As a result, they contribute to the dimensional stability of electronic devices.

CEM (composite epoxy materials) provide essential durability to electric circuits. CEM1 and CEM3 are popular choices for the production of single-sided and double-sided PCBs with 10 oz copper thickness. Epoxy resins and fiberglass materials utilized in these materials create strong bonding between the layers of the PCB, enhancing overall efficiency and reliability.

By combining these dielectric materials, a 10 oz copper PCB achieves optimal performance and durability, making it an excellent choice for applications requiring high current handling and efficient thermal management.

10 oz Copper PCBs: Advantages

Higher Current Carrying Capacity: Heavier copper PCBs have a higher current carrying capacity. This makes them ideal for applications that require a lot of power, such as in power supply units, automotive systems, and high-power transistors.

Improved Thermal Management: With their higher mass, 10 oz copper PCBs can manage heat better than their thinner counterparts. This is particularly useful in high-frequency electronics where managing heat is a significant challenge.

Increased Mechanical Strength: The added thickness provides mechanical strength to the PCB. This makes these types of PCBs suitable for applications where the board may be subject to physical stress.

Reduced Trace Width: Due to the increased thickness of copper, the trace width can be reduced. This helps in maintaining the same current carrying capacity while saving space on the PCB, enabling more compact designs.

Lower Risk of Circuit Failure: The thickness of the copper helps to reduce the risk of circuit failure due to trace damage or breakage. This is especially beneficial in applications where reliability is crucial.

Longer Lifespan: Due to their increased durability and heat resistance, 10 oz copper PCBs typically have a longer lifespan than their lighter counterparts.

Better Performance in Harsh Environments: 10 oz copper PCBs are more robust and can withstand harsh environmental conditions better than thinner copper PCBs. This makes them ideal for use in industrial and outdoor applications.

However, it’s important to note that these advantages come with a trade-off in terms of cost and weight. 10 oz copper PCBs are more expensive to produce and heavier, which can be a drawback in certain applications, particularly where weight or cost is a significant concern. Therefore, the choice of copper weight in a PCB depends on the specific requirements of the application.

10 oz PCB Manufacturing: Challenges

Printed Circuit Board (PCB) manufacturing is a complex process, and when it comes to manufacturing heavy copper PCBs, such as 10oz PCBs, there are even more challenges. Here are some of the main challenges involved in manufacturing 10oz PCBs:

High Costs

One of the biggest challenges in manufacturing 10oz PCBs is the high cost. The production of heavy copper PCBs requires more expensive materials and more time for etching, drilling, and other manufacturing processes. This results in a higher cost per unit, which can make these PCBs less affordable for some applications.

Increased Complexity

The manufacturing of 10oz PCBs is a more complex process compared to standard PCBs. The increased thickness of the copper layers makes etching and drilling more difficult. This can lead to a higher risk of defects and a lower yield, which also increases costs.

Heat Management

The larger amount of copper in 10oz PCBs can result in higher heat generation. This requires more effective heat management strategies, which can add complexity and cost to the manufacturing process.

Material Availability

The heavy copper used in 10oz PCBs is more difficult to source than the materials used in standard PCBs. This can lead to supply chain issues and longer lead times for manufacturing.

Design Limitations

The large amount of copper used in 10oz PCBs can limit the design possibilities. For example, it can be more difficult to create fine features or high-density interconnects with heavy copper PCBs.

Equipment Limitations

Not all PCB manufacturing equipment is designed to handle heavy copper PCBs. This can limit the options for manufacturing and increase the costs.

In conclusion, while 10oz PCBs offer many benefits, such as higher current carrying capacity and improved thermal management, their manufacture poses several challenges. Overcoming these challenges requires careful planning, specialized equipment, and potentially higher costs.

Design Techniques Of 10 Oz Copper PCB

Designing a 10 oz copper PCB requires careful consideration of several techniques to ensure optimal performance and reliability. Some key design techniques for 10 oz copper PCBs include:

Copper Trace Width and Spacing:

Due to the high current-carrying capacity of 10 oz copper, it is important to design wider copper traces to handle the increased current flow. Adequate spacing between traces should also be maintained to avoid any potential short circuits.

Thermal Management:

The increased copper weight in 10 oz copper PCBs helps with efficient heat dissipation. Utilizing thermal vias, thermal pads, and appropriate copper pours can effectively dissipate heat and prevent the PCB from overheating.

Power and Ground Planes:

Implementing dedicated power and ground planes in the PCB design helps in minimizing noise, providing stable power distribution, and improving signal integrity. These planes also contribute to the overall heat dissipation of the PCB.

Component Placement and Routing:

Proper component placement and routing techniques are crucial to minimize signal interference, reduce trace lengths, and optimize the overall electrical performance of the PCB. Paying attention to signal integrity and impedance matching is particularly important when dealing with high-speed signals.

Layer Stackup:

Carefully designing the layer stackup of a 10 oz copper PCB is essential to ensure optimum electrical performance, controlled impedance, and proper heat dissipation. Balancing the placement of power and ground layers along with signal layers is crucial for maintaining signal integrity and reducing electromagnetic interference (EMI).

Design for Manufacturability (DFM):

Considering manufacturability aspects during the design phase is vital to minimize potential fabrication issues. Designing with manufacturability in mind includes following PCB design guidelines, properly defining tolerances, and ensuring the design is compatible with the fabrication and assembly processes.

By implementing these design techniques, engineers can optimize the functionality, reliability, and thermal management capabilities of 10 oz copper PCBs, enabling them to handle high current loads and deliver superior performance.

How To Control Quality Of 10 Oz Copper PCB?

Controlling the quality of 10 oz copper PCBs involves implementing various measures throughout the manufacturing process. Here are some key steps to ensure quality control:

Design Verification:

Thoroughly review and verify the PCB design before initiating production. Conduct design rule checks (DRC) and manufacturing rule checks (MRC) to identify any potential design issues or violations that could affect the quality of the final product.

Material Selection:

Carefully select high-quality materials, including the copper foil, dielectric materials, and laminates. Ensure that the materials meet industry standards and specifications to guarantee the desired performance and reliability of the PCB.

Supplier Management:

Establish strong relationships with reputable suppliers who provide reliable and high-quality materials. Regularly assess and audit suppliers to ensure they meet quality standards and adhere to manufacturing processes.

Manufacturing Process Control:

Implement robust process control measures to monitor and control each stage of PCB production. This includes controlling temperature, pressure, and other parameters during material lamination, etching, drilling, plating, and solder mask processes. Regularly calibrate equipment and maintain process documentation to ensure consistency and accuracy.

Testing and Inspection:

Implement comprehensive testing and inspection procedures throughout the production process. This includes electrical testing, such as continuity testing, insulation resistance testing, and high voltage testing, to ensure the integrity and functionality of the PCB. Conduct visual inspections to detect any physical defects or anomalies.

Quality Assurance Documentation:

Maintain detailed records and documentation throughout the production process, including material certificates, process control records, testing reports, and non-conformance reports. This documentation helps track and verify compliance with quality standards and provides traceability of each PCB.

Continuous Improvement:

Regularly evaluate and analyze quality data and customer feedback to identify areas for improvement. Implement corrective actions to address any identified issues and ensure that lessons learned are applied to future PCB production.

By implementing these quality control measures, manufacturers can ensure that 10 oz copper PCBs meet the desired standards for performance, reliability, and durability.

10 Oz Copper PCB: Applications

10 oz copper PCBs are primarily used in applications that require high current-carrying capacity and efficient thermal management. Some common areas where 10 oz copper PCBs are used include:

Power Electronics:

10 oz copper PCBs are widely used in power electronics applications such as power supplies, inverters, motor drives, and high-power amplifiers. The thick copper helps to handle high currents and reduce resistive losses, ensuring efficient power delivery.

Automotive Industry:

In the automotive sector, 10 oz copper PCBs are utilized in electric vehicles (EVs), hybrid electric vehicles (HEVs), charging stations, battery management systems, and other power distribution applications. The high copper weight enhances current-carrying capacity, while efficient thermal management helps dissipate heat generated by the electronics.

Industrial Equipment:

10 oz copper PCBs find applications in various industrial equipment where high-power electronics are employed. This includes industrial automation systems, robotics, renewable energy systems, motor controllers, and high-current switches. The thick copper allows for efficient power transmission and minimizes voltage drop.

Aerospace and Defense:

The aerospace and defense industries utilize 10 oz copper PCBs in applications such as satellite systems, aircraft avionics, radar systems, missile guidance systems, and military-grade power electronics. The reliability and high current-handling capability of these PCBs are critical in such demanding environments.

High-Frequency Applications:

Although less common, 10 oz copper PCBs can also be used in high-frequency applications that require efficient grounding and heat dissipation, such as in RF amplifiers, transmitters, and high-frequency signal processing systems.

Overall, 10 oz copper PCBs are deployed in applications that demand robust electrical performance, high current-handling capacity, and effective thermal management. These PCBs enable reliable operation and improved efficiency in a wide range of industries.

Why Work with a Top 10oz PCB Fabricator?

Quality Assurance – Premier manufacturers have stringent quality control processes to ensure consistent PCB quality and reliability. They can meet exacting standards for circuit board performance.

Process Controls – Mature manufacturing capabilities allow for tight process controls. This results in high yield and low defect rates and helps minimize costs.

Experience – Working with an experienced manufacturer provides peace of mind. Their history of similar projects reduces risks associated with desktop prototyping or lesser known providers.

Capacity – Larger manufacturers have economies of scale and capacity to handle higher volume needs or accelerated timelines for development and production.

Service – Premium suppliers offer full-service support from design to assembly. This includes engineering guidance, rapid prototyping, custom changes and configuration management.

Reputation – Well-established brands have reputation for quality and stand behind their work. This provides assurance that issues will be addressed should any arise.

Summary, choosing a top-tier 10 oz PCB manufacturer delivers higher quality outcomes, process confidence and full-service capabilities due to their strong quality focus, production expertise and industry standing.

What Production Capabilities Should Manufacturers of 10 oz PCBs Possess?

Manufacturers of 10 oz copper multilayer PCBs need to possess a range of advanced production capabilities to ensure the reliable fabrication of high-quality boards:

Registration Accuracy: Ability to achieve precise alignment between layers within a tolerance of 0.10mm to avoid any misalignment issues.

Plating Aspect Ratios: Capability to achieve void-free copper plating in through holes with aspect ratios of at least 12:1, ensuring uniform plating throughout the holes.

Lamination: Expertise in ensuring the absence of filler starvation areas and precise control of pressure during the bonding process, resulting in consistent and reliable bonding between layers.

Etching: Capability to achieve fine line capability down to 1 mil line/space, enabling the manufacturing of intricate and precise circuit patterns.

Hole Wall Quality: Ability to achieve excellent resin coating on drilled hole walls, ensuring reliable electrical connections and preventing any issues with conductivity.

Surface Finish: Expertise in applying highly uniform thick gold plating over coarse copper, providing reliable and durable surface protection.

Peel Strength: Capability to achieve interlaminar peel strength over 9 N/mm, preventing delamination and ensuring the structural integrity of the PCB.

Via Filling: Proficiency in achieving pore-free copper plating fill on high aspect through holes, ensuring reliable conductivity and structural stability.

Drilling: Skill in drilling straight vertical holes through 14 mil copper with minimal taper, ensuring accurate hole placement and size.

Panel Flatness: Ability to control thickness variation below 5% and minimize bowing or twisting of the PCB panels, ensuring flatness and dimensional stability.

Reliability Testing: Capability to perform extensive reliability testing, including thermal shock/cycling, vibration, flexure, and other rigorous tests to validate the performance and durability of the PCB.

Process Control: Implementation of stringent process monitoring, change control, and corrective action systems to ensure consistent quality and reliability throughout the production process.

Possessing these technical capabilities demonstrates the maturity and competence of a PCB manufacturer in reliably producing 10 oz copper multilayer boards of high quality.

Your Top 10 Oz Copper PCB Manufacturer and Supplier in China

At JarnisTech, we take pride in being a professional 10 oz copper PCB manufacturer and factory situated in China. We encourage you to reach out to us through email for any inquiries you may have.

Here are some key points about our services:

● All our printed circuit boards (PCBs) adhere to IPC Class 2 or 3 standards, ensuring high-quality and reliable performance.

● With over 20 years of experience in 10 oz copper PCB manufacturing, we have developed a deep understanding of the intricacies involved in producing these advanced boards.

● We provide regular Work-in-Process (WIP) reports, updating you on the progress of your project throughout the manufacturing process.

● Prior to initiating manufacturing, all files undergo a comprehensive CAM review to ensure accuracy and optimize production efficiency.

● For your convenience, we have no minimum order quantity requirement for new orders. We are committed to accommodating your specific needs, regardless of the order size.

● Our dedicated sales and engineering technical support teams are available around the clock (24/7), providing timely and knowledgeable assistance to address any concerns or queries you may have.

We are confident in our ability to meet your requirements and deliver high-quality 10 oz copper PCBs. Please don’t hesitate to contact us via email to discuss your project or any additional questions you may have.

Frequently Asked Questions

Does 10 oz copper impact signal integrity in high-speed applications?

No, quite the opposite. The 10 oz copper traces provide extremely low losses and well-controlled impedance, which helps minimize effects like reflections and electromagnetic interference. This aids signal integrity for high-speed designs.

What is the minimum hole size achievable with 10 oz copper PCBs?

With advanced laser drilling techniques, hole diameters as small as 0.15mm can be reliably fabricated with an aspect ratio of 12:1 in 10 oz copper stacks.

Can components still be soldered to 10 oz copper boards?

Yes, the soldering process is fully compatible with 10 oz copper PCBs. The additional thermal mass of thicker copper can actually help prevent overheating of components during the soldering process.

Does 10 oz copper affect the flex or vibration response of PCBs?

There may be some minor damping effects compared to lighter copper cores. However, the copper and laminate materials retain substantially similar mechanical characteristics.

Is the cost significantly higher for 10 oz copper PCBs compared to 6 oz copper PCBs?

While the raw material cost is modestly increased, the specialized manufacturing capabilities required do result in a higher price compared to boards using thinner copper cores with equivalent layer counts.


By harnessing unparalleled capabilities, the production of high-quality 10 oz copper PCBs poses significant challenges. To optimize yield, performance, and long-term reliability, it is crucial for electronics companies to collaborate with an established manufacturer proficient in the intricate processes and stringent controls required for 10 oz multilayer boards. Choosing Jarnistech as a precision high-quality PCB partner with a demonstrated track record of expertise not only minimizes the risks associated with adopting thick copper technology but also facilitates the successful implementation of new product designs.

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