What is Aluminum PCB Board for LED
An aluminum PCB for LED is a type of printed circuit board that uses an aluminum substrate to effectively dissipate heat generated by light-emitting diodes (LEDs). This design enhances the performance and longevity of LED applications by efficiently managing thermal output.
Key Features:
- Structure: Comprises a thin layer of thermally conductive dielectric material between the aluminum base and the copper circuit layer, facilitating efficient heat transfer.
- Thermal Management: The aluminum base acts as a heat sink, rapidly dissipating heat away from the LEDs, which is crucial for maintaining optimal performance and preventing thermal degradation.
- Durability: Aluminum substrates provide mechanical stability, making the PCB more resistant to physical stress and suitable for various environments.
Features of Aluminum Substrate PCB
Aluminum substrates are commonly found in LED lighting products. There are two sides, the white side is for soldering LED pins, and the other side is aluminum in color. Generally, thermal conductive slurry will be applied to contact the thermal conductive part. There are also ceramic substrates, etc.
Definition
Aluminum substrate is a metal-based copper-clad board with good heat dissipation function. Generally, a single-sided board consists of three layers, namely the circuit layer (copper foil), the insulation layer and the metal base layer. There are also double-sided boards designed for high-end use, with the structure of circuit layer, insulation layer, aluminum base, insulation layer, and circuit layer. Very few applications are multi-layer boards, which can be made of ordinary multi-layer boards, insulation layers, and aluminum bases.
LED aluminum substrate is aluminum foil PCB, which also means printed circuit board, but the material of the circuit board is aluminum alloy. In the past, the material of our general circuit board was glass fiber, but because LEDs generate more heat, the circuit boards used for LED lamps are generally aluminum substrates, which can conduct heat quickly. The circuit boards used for other equipment or electrical appliances are still glass fiber boards!
Aluminum substrate structure composition
The circuit layer (generally electrolytic copper foil) is etched to form a printed circuit for device assembly and connection. Compared with traditional FR-4, with the same thickness and line width, aluminum substrates can carry higher currents.
The insulation layer is the core technology of aluminum substrates, which mainly plays the role of bonding, insulation and heat conduction. The insulation layer of aluminum substrate is the largest thermal barrier in the power module structure. The better the thermal conductivity of the insulation layer, the more conducive it is to the diffusion of heat generated by the device during operation, and the more conducive it is to reduce the operating temperature of the device, thereby achieving the purpose of increasing the power load of the module, reducing the volume, extending the life, and increasing the power output.
The type of metal used for the insulated metal substrate depends on the comprehensive consideration of the thermal expansion coefficient, thermal conductivity, strength, hardness, weight, surface state and cost of the metal substrate.
In general, considering the cost and technical performance, aluminum plate is a more ideal choice. The available aluminum plates are 6061, 5052, 1060, etc. If there are requirements for higher thermal conductivity, mechanical properties, electrical properties and other special properties, copper plates, stainless steel plates, iron plates and silicon steel plates can also be used.
Why Choose Us as Your Aluminum PCB Fabricator
Finest Printed Circuit Board Ltd is committed to delivering top-tier PCB aluminum substrate solutions by continuously enhancing product quality and service systems, solidifying our reputation as an industry leader.
Expertise in PCB Manufacturing
Finest Printed Circuit Board Ltd boasts a highly skilled technical R&D team specializing in aluminum substrates. We adhere to internationally recognized quality standards and excel in advanced manufacturing processes to deliver exceptional results.
Adherence to Quality Standards
Our production strictly complies with IPC-A-600 3/2/1 standards to ensure unparalleled product quality. Each PCB undergoes rigorous inspection to meet or exceed industry benchmarks.
State-of-the-Art Manufacturing
Equipped with cutting-edge production equipment, we excel in surface treatment technologies like OSP, ENIG, and HASL LF, delivering durable and precise PCBs tailored to various applications.
Superior Thermal Conductivity
We provide PCBs with thermal conductivity ranging from 1w/mk to 9w/mk, perfectly addressing the heat dissipation needs of high-power density electronic devices.
Comprehensive Quality Management
From raw material selection to final delivery, our strict full-chain quality management system ensures reliability, consistency, and customer satisfaction at every stage.
Responsive After-Sales Support
Our dedicated after-sales team offers prompt, worry-free assistance to address customer needs, ensuring a seamless experience from start to finish.
Product List
Advantages as a Aluminum PCB Supplier
By choosing Finest Printed Circuit Board Ltd, you gain access to unparalleled expertise, advanced production capabilities, and diverse solutions that meet the evolving demands of the electronics industry.
Ordinary Aluminum Substrate
- Application: Ideal for general lighting, such as streetlights and home lighting.
- Features: Stable performance, cost-effective, and easy to produce and process.
Mixed Aluminum Substrate
- Application: Designed for high-end lighting like stage lighting and automotive lighting.
- Features: Combines multiple materials for superior heat dissipation and electrical performance, tailored for complex and advanced applications.
Thermoelectric Separation Aluminum Substrate
- Application: Perfect for high-performance heat dissipation needs, such as LED displays and high-power lighting.
- Features: Separates hot spots from cold spots to enhance heat dissipation and extend equipment lifespan.
Double-Sided Sandwich Aluminum Substrate
- Application: Suitable for complex systems like smart lighting networks and large billboards.
- Features: Double-sided design increases wiring space and heat dissipation area, addressing intricate wiring and thermal management needs.
Advantages of aluminum-based PCB in LED lamps
- Efficient heat dissipation
LEDs generate a lot of heat during operation, and excessively high temperatures will affect the brightness, color temperature, and service life of the LED. Aluminum-based PCBs have excellent thermal conductivity and can quickly transfer heat from the LED chip to the lamp housing, ensuring that the LED works stably at low temperatures, extending the life of the LED and improving the reliability of the lamp. - Mechanical stability
Aluminum-based PCBs have good mechanical strength and durability, and can effectively withstand the impact and vibration of LED lamps during production, transportation, and use. At the same time, the structure of the aluminum substrate also helps to reduce the deformation of the circuit board and improve the overall stability of the lamp. - High temperature resistance and anti-aging performance
The insulating layer material of the aluminum substrate has high heat resistance and anti-aging properties, and can maintain stable performance in high temperature environments. For LED lamps with higher power and higher operating temperatures, aluminum-based PCBs can ensure that the lamps are not prone to insulation degradation or material aging during long-term use. - Lightweight and suitable for large-scale applications
Compared with traditional ceramic substrates and fiberglass substrates, aluminum substrates are lighter and have good heat dissipation. They are suitable for large-scale, lightweight LED lamps, such as car lights, outdoor lighting and commercial lighting. - Adapt to SMT process: Aluminum substrates are more suitable for surface mounting technology (SMT), simplifying the traditional electronic assembly process and improving production efficiency.
Application scenarios of aluminum substrate PCB
- High-power LED lamps
High-power LED lamps generate more heat during operation and require efficient heat dissipation to ensure brightness and stability. Aluminum substrate PCB has become an ideal choice for high-power LED lamps (such as mining lamps, street lights, stage lights, etc.) due to its excellent thermal conductivity. - Car lamp application
LED components in car lights usually operate in high temperature and high vibration environments, and aluminum substrate PCB is particularly important in this application scenario. It can not only dissipate heat efficiently, but also maintain the stability of the circuit under the vibration environment of the vehicle, so it is widely used in automotive lighting systems. - Outdoor lighting and commercial lighting
Aluminum substrate PCB is also widely used in outdoor lighting fixtures, such as road lights, garden lights and advertising light boxes. Outdoor lighting requires lamps to operate stably in complex environments such as high temperature, low temperature and high humidity. The waterproofness and corrosion resistance of aluminum substrates help extend the service life of lamps. In addition, the application of aluminum substrate PCB in commercial lighting (such as display lamps and spotlights) also helps to improve the reliability and light output quality of lamps. - Power hybrid IC (HIC). Audio equipment Input, output amplifier, balanced amplifier, audio amplifier, preamplifier, power amplifier, etc.
- Power supply equipment Switching regulator, DC/AC converter, SW regulator, etc. Communication electronic equipment High-frequency amplifier, filter appliance, transmission circuit.
- Office automation equipment Motor driver, etc. Automobile Electronic regulator, igniter, power controller, etc.
- Computer CPU board, floppy disk drive, power supply unit, etc.
- Power module Inverter, solid relay, rectifier bridge, etc.
Testing
Due to the nature of metal substrates, most end users require high voltage testing to ensure that the circuit pattern is isolated from the substrate. There are many types of equipment and many tooling configurations to complete the test.
| Test Item | Test Standard | Test Method | Test Result |
|---|---|---|---|
| 90°-peel strength | IPC-TM-650 2.4.9 | 25 μm film thickness 90°C × 40 min pre-bake 90°C × 6 kg/cm² × 10 s press 90°C × 90 min post-cure | 1.3 kg/cm |
| High-temperature aging | PC-TM-650 2.4.5.1 | 150°C × 6 H | Passed |
| Solder resistance | IPC-TM-650 2.4.28.1C | 288°C × 10 s × 3 times | Passed |
| Chemical resistance | IPC-TM-650 2.3.3 | MEK: 23°C × 1 min 2N NaOH: 23°C × 1 min 2N HCl: 23°C × 1 min | No Damage |
⑴.E-test: Standard E-test tooling facilitates continuous open and short circuit testing. Network testing ensures 100% electrical performance is intact. It can be tested with a general tester or a flying probe tester.
⑵.Hipot-test: High voltage testing is performed using a tooling with elastic nails. Using the network list data, 1~2 points are selected for each network and connected to the entire copper foil, and a low current insulation test is performed within 1 minute using a voltage of 500~2500VDC. The metal substrate is grounded, and the minimum leakage current can be detected during the rise to the final test voltage. A rise process of 5~10S is required to eliminate false failures caused by the capacitance formed by the insulating dielectric layer. Each piece requires a test time of 10S~1min.
One-stop PCB and PCB Assembly Service Provider
Finest PCB Assembly Limited is a professional, one-stop solution provider for PCB manufacturing and assembly services. We specialize in producing a wide range of PCBs and offer comprehensive assembly solutions tailored to meet diverse requirements.
Our team is equipped to tailor our services to meet your specific project needs. Send us your Gerber files and BOM lists today for a quotation, and we guarantee a quick response within 24 hours.
PCB Speciffications
| Category | Details |
|---|---|
| Assembly Type | FR4, FPC, Rigid-flex PCB, Metal base PCB |
| Assembly Specification | Minimum size: L50 × W50 mm; Maximum size: L510 × W460 mm |
| Assembly Thickness | Minimum thickness: 0.2 mm; Maximum thickness: 3.0 mm |
| Components Specification | Components DIP: 01005 Chip/0.35 Pitch BGA Minimum device accuracy: ±0.04 mm Minimum footprint distance: 0.3 mm |
| Capacity | SMT assembly: 5 million points/day; Plug-in & welding: 300,000 points/day; 50-100 items/day |
| File Format | BOM list; PCB Gerber file |
| Test | – IQC: Incoming inspection – IPQC: Production inspection; first ICR test – Visual QC: Regular quality inspection – SPI test: Automatic solder paste optical inspection – AOI: SMD component welding detection, components shortage & polarity detection – X-Ray: BGA test; QFN and other precision devices hidden PAD device inspection – Function test: Test function and performance according to customer’s test procedures and steps |
| Reworking | BGA rework equipment |
| Delivery Time | – Normal delivery time: 24 hours (fastest: 12 hours quick-turn) – Small production: 72 hours (fastest: 24 hours quick-turn) – Medium production: 5 working days |
| Components Service | – A full set of substitute materials: Experienced in component procurement sourcing, management system, providing cost-effective services for OEM projects. – Only SMT: Perform SMT and backhand welding according to components PCB boards provided by customers. – Components Purchasing: Customers provide core components; we source additional components. |
| Specialized PCB Design | Rigid-Flex PCB Design, High-Frequency Circuit Board Design, High-Precision Circuit Board Design, High-Density PCB Design, Blind Buried PCB Design |
| Customization | Our team tailors services to specific project needs, including single-layer and multilayer PCB production and PCB assembly. |
