{"id":2994,"date":"2026-06-19T02:27:11","date_gmt":"2026-06-18T18:27:11","guid":{"rendered":"http:\/\/www.noithatdonghai.com\/blog\/?p=2994"},"modified":"2026-06-19T02:27:11","modified_gmt":"2026-06-18T18:27:11","slug":"what-are-the-standards-for-metal-based-boards-4c3c-f577cf","status":"publish","type":"post","link":"http:\/\/www.noithatdonghai.com\/blog\/2026\/06\/19\/what-are-the-standards-for-metal-based-boards-4c3c-f577cf\/","title":{"rendered":"What are the standards for Metal Based Boards?"},"content":{"rendered":"

Metal based boards, also known as metal core printed circuit boards (MCPCBs), have become increasingly popular in various industries due to their excellent thermal management capabilities, mechanical strength, and electrical performance. As a supplier of metal based boards, I understand the importance of meeting high – quality standards to ensure customer satisfaction and product reliability. In this blog, I will discuss the key standards for metal based boards from different aspects. Metal Based Board<\/a><\/p>\n

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Material Standards<\/h3>\n

Metal Core<\/h4>\n

The metal core is the foundation of a metal based board. Commonly used metals include aluminum, copper, and iron. Aluminum is the most popular choice because of its good thermal conductivity, lightweight, and relatively low cost. The purity of the aluminum core is an important factor. High – purity aluminum (usually 99% or higher) provides better thermal performance. For example, in high – power LED applications, a high – purity aluminum core can effectively dissipate heat, prolonging the lifespan of the LEDs.<\/p>\n

The thickness of the metal core also matters. Thicker metal cores can generally provide better heat dissipation, but they may increase the weight and cost of the board. The thickness typically ranges from 0.8mm to 3.0mm, depending on the specific application requirements. For instance, in automotive electronics, where space and weight are limited, a thinner metal core might be preferred while still maintaining sufficient thermal conductivity.<\/p>\n

Dielectric Layer<\/h4>\n

The dielectric layer is located between the metal core and the circuit layer. It has several important functions, including electrical insulation and heat transfer. The dielectric material should have high dielectric strength to prevent electrical short – circuits. A common standard for dielectric strength is at least 10 kV\/mm.<\/p>\n

Thermal conductivity is another crucial property of the dielectric layer. A high – thermal – conductivity dielectric material can efficiently transfer heat from the circuit layer to the metal core. Values of thermal conductivity for good dielectric materials can range from 1.0 W\/mK to 5.0 W\/mK. For example, in power electronics applications, a dielectric layer with high thermal conductivity can help in reducing the operating temperature of the components.<\/p>\n

The dielectric layer should also have good adhesion to both the metal core and the circuit layer. Poor adhesion can lead to delamination, which can affect the electrical and thermal performance of the board. Adhesion strength is typically measured in pounds per square inch (psi), and a minimum adhesion strength of 80 psi is often required.<\/p>\n

Circuit Layer<\/h4>\n

The circuit layer is where the electrical components are connected. The copper used in the circuit layer should have high purity, usually 99.9% or higher. High – purity copper provides better electrical conductivity, reducing power losses.<\/p>\n

The thickness of the copper layer can vary depending on the current – carrying requirements. For low – power applications, a thinner copper layer (e.g., 18\u03bcm) may be sufficient, while for high – power applications, a thicker copper layer (e.g., 70\u03bcm or more) is needed. The line width and spacing of the circuit traces are also important standards. Narrower line widths and smaller spacings can increase the circuit density, but they also require more precise manufacturing processes. A common standard for line width and spacing is 0.1mm\/0.1mm, but in some high – density applications, it can be as small as 0.05mm\/0.05mm.<\/p>\n

Manufacturing Process Standards<\/h3>\n

Drilling<\/h4>\n

Drilling is an important step in the manufacturing of metal based boards. The holes in the board are used for component mounting and electrical connections. The drill bit diameter should be accurately controlled to ensure the proper size of the holes. The tolerance for hole diameter is typically \u00b10.05mm.<\/p>\n

The drill holes should be straight and free of burrs. Burrs can cause short – circuits or affect the soldering quality. After drilling, a deburring process is usually carried out to remove any burrs on the hole walls.<\/p>\n

Etching<\/h4>\n

Etching is used to form the circuit patterns on the copper layer. The etching process should be well – controlled to ensure the accuracy of the circuit traces. The side – etch ratio, which is the ratio of the lateral etching to the vertical etching, should be minimized. A low side – etch ratio can result in more precise circuit patterns. A common standard for the side – etch ratio is less than 1:1.<\/p>\n

The etching process should also ensure that the copper is completely removed from the non – circuit areas. Any residual copper can cause short – circuits between the traces.<\/p>\n

Soldering Mask Application<\/h4>\n

The soldering mask is applied to protect the circuit traces and prevent solder bridging during the soldering process. The soldering mask should have good adhesion to the circuit layer and should be able to withstand high temperatures during soldering. The thickness of the soldering mask is typically in the range of 15\u03bcm to 30\u03bcm.<\/p>\n

The color of the soldering mask can also be a standard. Green is the most common color, but other colors such as red, blue, and black are also available. The color should be uniform and free of defects such as bubbles or scratches.<\/p>\n

Performance Standards<\/h3>\n

Thermal Performance<\/h4>\n

One of the main advantages of metal based boards is their excellent thermal performance. The thermal resistance of the board is an important parameter to measure the heat – transfer efficiency. The thermal resistance should be as low as possible. For example, in a high – power LED application, a metal based board with a thermal resistance of less than 1\u2103\/W is often required.<\/p>\n

The temperature distribution on the board should also be uniform. Non – uniform temperature distribution can cause thermal stress, which can lead to component failure. Thermal imaging can be used to measure the temperature distribution on the board.<\/p>\n

Electrical Performance<\/h4>\n

The electrical performance of metal based boards includes parameters such as insulation resistance, dielectric constant, and impedance. The insulation resistance between the circuit traces should be high, typically greater than 100 M\u03a9. A low insulation resistance can cause leakage current, which can affect the performance of the circuit.<\/p>\n

The dielectric constant of the dielectric layer should be stable over a wide range of frequencies. A stable dielectric constant ensures the accurate transmission of electrical signals. The impedance of the circuit traces should also be matched to the impedance of the connected components to minimize signal reflection.<\/p>\n

Mechanical Performance<\/h4>\n

The mechanical performance of metal based boards is important for their durability and reliability. The board should have sufficient flexural strength to withstand bending and vibration. The flexural strength is typically measured in MPa, and a minimum flexural strength of 100 MPa is often required.<\/p>\n

The board should also have good resistance to thermal cycling. Thermal cycling can cause expansion and contraction of the materials, which can lead to cracking or delamination. A metal based board should be able to withstand a certain number of thermal cycles without significant damage.<\/p>\n

Quality Control Standards<\/h3>\n

In – process Inspection<\/h4>\n

During the manufacturing process, in – process inspection is carried out at various stages to ensure the quality of the metal based boards. For example, after drilling, the hole diameter and quality are inspected. After etching, the circuit patterns are checked for accuracy. In – process inspection helps to identify and correct any manufacturing defects early, reducing the cost of rework.<\/p>\n

Final Inspection<\/h4>\n

Before the metal based boards are shipped to the customers, a final inspection is carried out. The final inspection includes a visual inspection to check for any surface defects such as scratches, cracks, or discoloration. Electrical and thermal performance tests are also conducted to ensure that the boards meet the specified standards.<\/p>\n

Certification<\/h4>\n

Many metal based board suppliers obtain certifications such as ISO 9001 (Quality Management System) and UL (Underwriters Laboratories) certification. ISO 9001 certification ensures that the supplier has a well – established quality management system in place. UL certification indicates that the metal based boards meet the safety standards set by Underwriters Laboratories.<\/p>\n

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As a supplier of metal based boards, we are committed to meeting these high – quality standards to provide our customers with reliable and high – performance products. If you are in need of metal based boards for your application, whether it is for LED lighting, power electronics, or automotive electronics, we would be more than happy to discuss your requirements. Our experienced team can provide you with customized solutions based on your specific needs. Contact us to start a procurement discussion and let us work together to achieve your project goals.<\/p>\n

Metal Based Board<\/a> References:<\/p>\n