Aluminum PCBS
sEvery rigid and flexible printed circuit board (PCB) design is different, customized to meet the board’s purpose. The same is true for the PCB base material — fiberglass is a popular base material, but aluminum-based PCBs are also very effective in many industry applications. Aluminum PCBs consist of a metal-based, copper-covered laminate that delivers high performance, including superior electrical insulation and thermal conductivity.
Aluminum printed circuit boards are also known as metal base PCBs and are comprised of metal-based laminates covered by a copper foil layer. They are made of alloy plates that are a combination of aluminum, magnesium and silumin (Al-Mg-Si). Aluminum PCBs deliver excellent electrical insulation, good thermal potential and high machining performance, and they differ from other PCBs in several important ways.
THE ALUMINUM BASE LAYER
This layer consists of an aluminum alloy substrate. The use of aluminum makes this type of PCB an excellent choice for through-hole technology, discussed later.
THE THERMAL INSULATION LAYER
This layer is a critically important component of the PCB. It contains a ceramic polymer that has excellent viscoelastic properties, great thermal resistance and defends the PCB against mechanical and thermal stresses.
THE COPPER FOIL LAYER
The circuit layer contains the copper foil mentioned previously. Generally, PCB manufacturers use a copper foil layer ranging from one to 10 ounces.
THE DIELECTRIC LAYER
The dielectric layer of insulation absorbs heat as current flows through the circuits. This is transferred to the aluminum layer, where the heat is dispersed.
Achieving the highest light output possible results in increased heat. PCBs with improved thermal resistance extend the life of your finished product. A qualified manufacturer will provide you with superior protection, heat tolerance and part reliability. At MCL, we hold ourselves to the exceptionally high standards and quality your projects require.
