PCB is a power supply source to run different electronic devices. In PCB Assembly, Printed circuit boards have different base materials, depending on their application. In general, circuit boards have a fiberglass base, but aluminum-backed PCB is also common it has a metal base but the laminate is covered with copper. Such PCB performs better due to high-end thermal conductivity and electrical insulation.
The aluminum-backed circuit board involves alloy plates which are a blend of three metals, including aluminum, silicon, and magnesium. These PCBs are different from fiberglass. Let’s discuss different layers in an aluminum PCB.
First Layer or Base: It has an aluminum alloy that helps have an effective through-hole PCB.
Thermal Insulation: It consists of ceramic polymer and it is vital for a PCB. The polymer has a high thermal resistance, good viscoelastic properties, and a high resistance to mechanical stresses.
Copper Foil: It is the circuit layer with copper foil, and it may weigh up to one to 10 ounces.
Dielectric Layer: the purpose of the dielectric is to absorb heat when there is current in the circuits. Then it goes to aluminum, dispersing the heat. PCB having a better thermal resistance enhances its life.
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24 июл 2024
