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Тяжелая медная печатная плата
Top Heavy Copper PCB Manufacturer in China
- Over 20 Years as a Thick Heavy Copper PCB Supplier
- High-quality Heavy Copper PCB at competitive prices
- Manufactures Heavy Copper PCB with thick copper layers 4oz to 100 oz
- Excellent current carrying capacity and thermal management
- Suitable to high-power, high-current, and high-frequency applications.
This article will help you learn the construction, manufacturing process, and material properties of thick copper PCB. It’ll help you make a decision when selecting the right material for your project. PCBTok, as an experienced heavy copper PCB manufacturer, we can meet the strict process requirements of your project with high thicknesses of copper (4 oz-100 oz). We also offer the flexibility to support rapid prototyping and low to medium volume production.
Что такое тяжелая медная печатная плата?
Heavy copper PCBs are printed circuit boards made with much thicker copper layers than standard types—typically 3 ounces or more per layer. These boards are engineered for performance in demanding environments. You’ll often find them in power supplies, electric vehicles, military systems, and industrial controls.
They can handle high current without overheating. The thicker copper spreads heat more efficiently, which helps protect other components. It also improves the board’s lifespan and reliability.
You also get another key benefit: space-saving. Thicker copper lets you use narrower traces. So even in compact designs, you still carry the same current. That makes things simpler when space is tight or layout gets tricky.
You don’t need complex cooling strategies either. The board takes care of that. And since the copper adds mechanical strength, it holds up better under vibration, heat, and wear. You’re building something that needs to last. This kind of board helps it do just that.
In short, heavy copper PCBs give you more power, more heat resistance, and better durability. When your application demands more, they meet the challenge—quietly, efficiently, and without compromise.
Строительство печатной платы из тяжелой меди
The construction of heavy copper PCBs involves modified processes to handle the demands of increased copper thickness. While the core manufacturing steps—such as etching, plating, and lamination—are similar to those used in standard PCBs, heavy copper designs require enhanced precision and control.
Typically, the process starts with bonding thick copper foil to the substrate. Unwanted copper is removed through etching, and plating is used to reinforce key features like traces, pads, and planes.
In multilayer or double-sided boards, each circuit layer is fabricated individually, then laminated together using high-performance materials such as FR4, polyimide, or CEM-3. Lamination ensures electrical connectivity and structural strength across layers. For heavy copper PCBs, the challenge increases significantly.
Etching must remove larger volumes of copper, which raises process time and cost. Maintaining trace geometry becomes more difficult, especially for narrow lines. Sidewalls must be clean and uniform, and thick traces often result in uneven surfaces if not properly controlled.
Heavy Copper PCB Processes
In heavy copper PCB production, specific techniques are used to manage thick copper and ensure stable board performance. Each process offers its own benefits, depending on the design requirements and current-carrying needs.
Blue Bar Method
This process places a thick copper bar directly into the PCB structure. The space around the bar is filled with resin. This helps reduce the overall copper usage while keeping performance high. It also improves surface flatness. Resin flows into the gaps and forms a smoother, more stable layer. It’s a smart way to save material without losing strength or conductivity.
Нанесение ламината
Here, a thick base copper is applied during the lamination step. It gives steady and reliable copper placement. The edges of traces stay controlled and clean. This method works well for fine traces and spacing. You can count on its repeatability in high-current designs.
Buried Copper Process
In this one, thick copper is inserted into prepreg before final lamination. Laser cutting shapes the copper layer. Resin thickness controls how deep the copper sits. This technique is precise, especially when working with multiple layers. It allows tight control over copper placement inside the board.
Современный материал, используемый в печатных платах с тяжелым медным покрытием
One key material is RTF, or Reverse Treated Foil copper. Its lower surface roughness (Ra value) compared to standard copper makes it more stable under high thermal and electrical stress. RTF copper also offers better adhesion, коррозия resistance, and current-carrying performance. This makes it a preferred option for heavy copper applications.
In high-layer-count designs where internal copper thickness exceeds 4 oz, traditional fillers like PP powder or resin can be hard to control. They may lead to uneven layering or extended process times. Modern heavy copper PCB manufacturing now turns to specialized resin systems with better heat resistance and lower тепловое расширение. These materials ensure flat lamination and better structural stability. They also improve heat dissipation, helping reduce thermal buildup across the board.
As demand for high-power electronics grows, manufacturers are investing in materials that meet these needs. Enhanced copper PCBs can reduce heating rates by around 10°C, a meaningful improvement in power systems. Going forward, heavy copper rigid, flex, and hybrid PCBs will continue evolving through material innovation and refined processes.
Преимущества тяжелой медной печатной платы
Возможность сильного тока
Designed to handle much higher current loads. Because of thick copper layers, it minimize resistance and enable efficient current flow without the risk of overheating. Ideal for power distribution systems and high-load circuits that can exceed 30 amps.
Increased Thermal Management
Excel at dissipating heat thanks to their enhanced thermal mass. Effectively draws heat away from the components. It helps to minimize thermal stress and lowers the chances of failure. Best for applications where keeping temperatures in check is crucial for both performance and safety.
Повышенная долговечность
Heavy Copper PCBs are built to last. It can handle the wear and tear from thermal cycling, mechanical stress, and tough environments. It has a longer operational life and are more reliable for those mission-critical applications.
Excellent Dissipation Factor
Known for their low dissipation factor. Effective at minimizing energy losses in high-power systems. Has excellent thermal conductivity, they can quickly disperse heat. It can keep sensitive components safe from overheating and boosting overall efficiency.
Хороший дирижер
The increased amount of copper really boosts electrical conductivity. Great for ensuring efficient signal transmission and power distribution throughout interconnected systems. Useful in complex assemblies where having low impedance and strong electrical pathways is crucial.
PCBTok Manufacturing Capabilities for Heavy Copper PCB
| Особенность | Возможности |
| Типы материалов | FR-4 Standard, FR4-High Tg, KB, Shengyi, GETEK, 370HR, IT180A, Rogers PTFE laminates (Taconic, Arlon, Nelco), Hybrid materials |
| Класс качества | IPC Class 2/ IPC Class 3 |
| Copper Thickness (Finished) | Min 0.5 oz –Max 10 oz |
| Extremely heavy copper | 100oz |
| Количество слоев | 1–40 слоя |
| Минимальная толщина сердцевины | 0.15mm (6mil) for Standard, 0.1mm (4mil) for Advanced |
| Minimum Tracing/Spacing | Down to 3mil (internal), 3.5mil (external) depending on copper weight |
| Заказанное Количество | 1 pc to 10,000+ pcs |
| Размер платы | Min 6mm × 6mm, Max 1100mm × 500mm |
| Толщина доски | 0.2 мм – 10 мм |
| Hole Aspect Ratio | 10:1, Up to 20:1 |
| Варианты отделки поверхности | HASL, Lead-Free HASL (RoHS), ENIG ENEPIG, Hard Gold, Immersion Silver, OSP |
| Цвет паяльной маски | Green, White, Blue, Black, Red, Yellow, Purple (matte/glossy also available) |
| Мин Кольцо Кольцо | 6мил |
| Другие возможности | Слепые/Погребенные Виас, Золотые пальцы |
How to Select Copper Thickness for Heavy Copper PCB
Selecting the proper copper thickness for a heavy copper PCB requires careful evaluation of electrical, thermal, mechanical, and manufacturing factors. Each parameter plays a direct role in how the board will perform under operating conditions. Begin by assessing the current load each trace must carry.
Higher current levels demand thicker copper to reduce resistive losses and maintain safe operating temperatures. For example, traces handling up to 20A typically require 3–4 oz copper. Loads between 20A and 50A often necessitate 6–8 oz, while applications exceeding 50A generally require 10 oz or more.
Thermal performance is also critical. Increased copper thickness improves heat dissipation, which is essential in high-power designs. This helps protect temperature-sensitive components and maintains board reliability over time. Mechanically, thicker copper layers can add structural integrity to the PCB, particularly in large or high-vibration assemblies.
Heavy Copper PCB Industry Applications
Heavy Copper PCBs are used where heat, current, and durability matter. Their thick copper layers handle stress, making them ideal for demanding environments. Here’s where you’ll commonly find them:
– Аэрокосмическая промышленность – Used in control units and power systems. Built to resist heat and vibration at high altitudes.
- автомобильная – Found in engine control, signal systems, and power modules. They handle high temps and mechanical stress well.
– Промышленный контроль – Used in welding gear, safety relays, and surge protectors. Strong enough for harsh factory settings.
- военные – Applied in radar, weapon control, and surveillance. Offers stability in high-stress, mission-critical tasks.
– Power Distribution – Ideal for rectifiers, grid switches, and regulators. Handles high currents with stable performance.
– Power Electronics – Used in inverters, motor drives, and power supplies. Manages heat and current with long-lasting durability.
– Renewable Energy – Installed in converters, storage units, and hydro controls. Supports clean energy systems with reliable output.
- Транспорт – Used in railway converters and traction systems. Withstands constant movement and electrical load.
Why Choose PCBTok as Your Heavy Copper PCB Fabricator?
If you’re in search of a manufacturer who truly understands the complexity and performance demands of heavy copper PCBs, PCBTok is your ideal fabrication partner.With more than 20 years of experience in producing thick copper circuit boards, we combine engineering precision, advanced processing, and superior materials to deliver high-quality PCBs with copper weights ranging from 4oz to 100 oz and beyond.
Our expertise covers all technical aspects discussed throughout this conversation—from selecting optimal copper thickness based on current, thermal, and mechanical load requirements, to mastering the construction challenges such as deep etching, uneven trace formation, and advanced lamination for multi-layer designs. In terms of materials, we utilize high-performance substrates such as FR4, polyimide, and reverse treated (RTF) copper foils to enhance thermal conductivity, mechanical integrity, and electrical reliability.
At PCBTok, we not only manufacture standard heavy copper PCBs but also specialize in rigid-flex formats, aluminum-backed boards, and copper-based assemblies tailored to your performance and environmental requirements. With full control over supply chains and a commitment to international quality standards, PCBTok offers competitive pricing, rapid response, and dependable lead times.
Our professional support team is ready to review your design files, provide engineering feedback, and deliver fast, accurate quotations. Send us your Файл Гербера today or reach out for technical consultation and rapid quote —we’re here to ensure your project succeeds with the best heavy copper PCB solutions available.
Получите мгновенную онлайн-расценку сегодня
Easily obtain a real-time quote for your Heavy Copper PCB with PCBTok. If you’re looking for reliable pricing and fast turnaround, simply send us your Gerber files along with your DFM. PCBTok will immediately schedule your fabrication with precision and speed. For any inquiries or special requirements, feel free to contact our team—we’re here to support all your Heavy Copper PCB needs.
FAQ
The maximum copper thickness on a PCB typically reaches up to 20 oz/ft² (700 μm) for most commercial applications. However, for specialized uses—such as high-current or тепловое управление systems—thicknesses exceeding 30 oz/ft² (1050 μm) can be achieved by experienced manufacturers like PCBTok. It’s important to note that as copper thickness increases, so do manufacturing complexities, including etching precision, lamination stress, and overall cost. Selecting the right copper weight should align with your current-carrying, thermal, and mechanical requirements, while also considering fabrication feasibility and budget. For expert guidance, consult with PCBTok’s technical team.
Heavy Copper PCBs built on rigid substrates are not designed to be bent, as doing so would cause structural damage. However, Heavy Copper Flex PCBs can be engineered using flexible base materials combined with thicker copper layers. While they support higher current loads, their bendability is limited compared to standard гибкие печатные платы, and a larger bend radius is required to prevent stress on the copper
Heavy Copper PCBs stand out from standard PCBs in both their structure and their applications. While standard boards usually feature copper thicknesses ranging from 1 oz to 3 oz, heavy copper boards kick off at 3 oz and can go beyond 100 oz for those demanding high-power situations. They need specialized processes like step plating and careful etching to maintain the integrity of the traces. Unlike standard boards that have set copper specifications, heavy copper PCBs provide more flexibility in terms of both internal and external copper thickness, making them perfect for environments that require high current and reliability.
Electrodeposited (ED) copper and Rolled-Annealed (RA) copper are used as copper in PCB fabrication
Электроосажденная (ЭО) медь
ED copper is created through an electrochemical process that deposits copper ions onto a substrate. This method results in a surface that’s incredibly uniform, making it a popular choice for rigid PCBs. Its ability to form fine traces is crucial for applications that require high density and high frequency. Additionally, ED copper is often coated with an anti-oxidation layer to help it last longer during storage.
Rolled-Annealed (RA) Copper
RA copper is created by rolling copper into thin sheets and then annealing them to boost their ductility. This process gives it a smooth surface and a grain orientation that enhances flexibility, making it perfect for both flex and жестко-гибкие схемы. RA copper excels in dynamic bend applications and is often the go-to choice for high-speed signal transmission, thanks to its reliable grain structure.
All PCBs use copper as the conductive material, so the term “Copper PCB” refers to standard designs with typical copper thicknesses. A “Heavy Copper PCB,” however, features copper layers of 3 oz/ft² or more. This increased thickness enhances current capacity, heat dissipation, and durability. In short, all Heavy Copper PCBs are Copper PCBs, but not all Copper PCBs meet the criteria to be considered heavy copper.
The number of copper layers in a PCB really hinges on its design. For instance, a single-sided PCB features just one copper layer, while a double-sided PCB boasts two. When it comes to multi-layer PCBs, like those with 4 or 6 layers, they pack in more than two copper layers, usually organized in pairs. Each layer has its own role, whether it’s for signals, power, or grounding, depending on what the application requires.
No, a 2oz copper PCB doesn’t really fit the bill as a heavy copper PCB. By industry standards, you need a copper thickness of at least 3oz per square foot for a PCB to earn that “heavy copper” label. So, while 2oz copper PCBs are generally seen as standard or moderately thick, they just don’t quite make the cut for heavy copper.