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10 Oz Copper PCB

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

In the relentlessly evolving sphere of electronics, the call for high-caliber printed circuit boards capable of managing greater currents and thermal loads is on an upward trajectory. This has led to the need for ultra-high performance PCB using 10 oz copper thickness. However, crafting reliable 10 oz copper multilayer boards embodies substantial challenges. Therefore, the onus lies with electronics engineers to align with an reliable PCB manufacturer who possesses proven expertise in 10 oz technology. This strategic alliance guarantees impeccable quality alongside peak performance.

This article aims to provide electronics engineers with a comprehensive overview of the capabilities of 10 oz copper PCB, 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 PCB, its increased weight enhances functionality. Notably, thick copper PCB are recognized for their superior electrical conduction properties.

Here are a few common thickness measurements;

1 OZ is equal to 35μm
2 OZ is equivalent to 70μm.
4 OZ is around 140μm.
6 OZ corresponds to 210μm.
10 OZ equals about 350μm.

By employing a 10 oz copper PCB, the overall production cost can be optimized without compromising performance. Consequently, electronic applications utilizing this thick PCB types 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 PCB include FR-4, CEM1, CEM3 and 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 PCB 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 PCB 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 PCB: Advantages

Higher Current Carrying Capacity:  PCB with a more substantial copper density hold an elevated capacity to conduct current. This unique feature earmarks these PCB as the preferred choice for operations demanding substantial power, including power regulation modules, vehicular systems, and high-energy transistors.

Improved Thermal Management: With their higher mass, 10 oz copper PCB 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 PCB 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 PCB are more robust and can withstand harsh environmental conditions better than thinner copper PCB. 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. PCB engineered with 10 oz copper are costlier to fabricate and significantly heavier. These factors could be considered disadvantages in certain scenarios, particularly when weight or fiscal constraints are prominent aspects. Therefore, the decision of copper density on a PCB is purely contingent on the unique stipulations of the application.

10 oz PCB Manufacturing: Challenges

Fabrication of Printed Circuit Boards is an intricate process and the manufacturing of heavy copper PCB, such as those incorporating 10 oz copper, encapsulates huge challenges. Following are some of the prime challenge associated with the production of 10 oz PCB:

High Costs:

A leading hurdle in the manufacturing of 10 oz PCB is the associated high costs. The manufacturing of these heavy copper PCB demands pricier materials along with an extended duration for etching, drilling, and other fabricating operations. Consequently, this translates into an increased unit cost, potentially making these PCB less cost-effective for certain applications.

Increased Complexity:

The fabrication of 10 oz PCB encompasses a higher degree of complexity when compared with standard PCB. The amplified thickness of copper layers adds difficulty to etching and drilling procedures. As a result, this can instigate a heightened risk of discrepancies and diminished yields, further escalating the overall costs.

Heat Management:

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

Design Limitations:

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

Equipment Limitations:

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

In conclusion, while 10oz PCB 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 PCB include:

Copper Trace Width and Spacing:

Considering the elevated current-carrying capacity of 10 oz copper, it’s crucial to engineer broader copper traces to accommodate the augmented current stream. Suitable distancing among traces should concurrently be preserved to deter any probable occurrence of short circuits.

Thermal Management:

The increased copper weight in 10 oz copper PCB 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):

Incorporating manufacturability considerations throughout the design stage is a vital step to curtail potential production complications. Approaching design with manufacturability perspectives incorporates adherence to PCB design rules, correct determination of tolerances, and the assurance of design compatibility with both the fabrication and assembly procedures.

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

How to Control Quality Of 10 Oz Copper PCB?

Ensure the high quality of a 10 oz copper PCB entails the execution of manifold measures throughout the fabrication process. Here are principal steps to confirm quality control:

Design Validation: Rigorously inspect and verify the PCB design prior to kickstarting production. Perform 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 Choice: Mindfully select superior-quality elements, including copper foil, dielectric substances, and laminates. Confirm these components meet industry standards and specifications, thus guaranteeing intended performance and dependability of the PCB is achieved.

Vendor Relations: Cultivate solid connections with trustworthy suppliers, known for their consistent supply of dependable, high-quality materials. Regularly execute evaluations and audits on these suppliers to ensure they comply with quality norms and production procedures.

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 rectification measures to tackle any discovered concerns, guaranteeing that insights gained are implemented into subsequent PCB manufacturing endeavours.

10 Oz Copper PCB: Applications

Power Electronics: 10 oz copper PCB 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: Within the automobile industry, 10 oz copper PCBs find application in electric vehicles (EVs), hybrid electric vehicles (HEVs), charging infrastructure, battery administration systems, along with other power management applications. The high copper weight bolsters current carrying proficiency, while efficient thermal management contributes to the dispersion of heat produced by the electronic components.

Industrial Equipment: 10 oz copper PCB 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 PCB are critical in such demanding environments.

High-Frequency Applications: While not typically utilized, 10 oz copper PCB can be deployed in high-frequency applications demanding effective grounding and thermal management, examples being RF amplifiers, transmitters, and high-frequency signal execution systems.

Overall, 10 oz copper PCB are deployed in applications that demand robust electrical performance, high current-handling capacity, and effective thermal management. These PCB 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 PCB 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 FinishExpertise 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 board adhere to IPC Class 2 or 3 standards, ensuring high-quality and reliable performance.

● Commanding a wealth of experience spanning two decades in the realm of 10 oz copper PCB production, we’ve gained a profound comprehension of the sophisticated processes inherent in creating these high-end boards.

● We provide regular Work-in-Process reports, which keeps you abreast of your project’s progress at every stage during the course of its fabrication.

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

● To serve your demands optimally, we’ve eliminated the requisite for a minimum quantity on new orders. Our dedication lies in catering to your unique requirements, irrespective of the magnitude of the order.

● Our professional sales and engineering technical support teams operate full-time providing timely and knowledgeable assistance to address any concerns or queries you may have.

We are sure that we can meet your needs and provide 10 oz copper PCBs. We cordially invite you to reach out to us via email to converse on the specifics of your project or any additional inquiries that you might harbor.

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 PCB?

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 PCB. 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 PCB?

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 PCB compared to 6 oz copper PCB?

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 PCB 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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