The thermal conductivity of copper is as high as 386.4w/(m.k), which is an excellent thermal conductive material, and its performance is much higher than that of aluminum, and it has an absolute advantage in heat dissipation.
In some products with extremely high requirements for heat dissipation, when the aluminum substrate cannot be satisfied, the copper PCB naturally becomes a better choice.
SEEKPCB is a reliable copper PCB manufacturer that manufactures copper substrates for thermoelectric separation technology, and we have a wide range of copper and thermally conductive adhesives to provide quick turn copper PCB prototype service.
Copper PCB is a kind of metal pcb board with copper plate as the substrate, its structure is consistent with aluminum substrate, and can be divided into copper base pcb and copper core pcb.
Copper base pcb is a copper PCB with copper plate on bottom side. It is the most common copper PCB. The most common copper base PCB is a single-sided structure, which has the best heat dissipation effect, and the copper base PCB above double-sided is rarely used because of its unsatisfactory heat dissipation effect.
Copper core pcb is a copper PCB with copper palte in the middle, more like a Sandwiches structure. Similarly, because the heat dissipation effect is limited by the thermal conductive resin, and the processing is too difficult and the cost is too high, it is rarely used.
The copper plate and the copper foil are adhered to each side of the single-sided copper PCB through thermal conductive resin, and the copper foil surface is used to make the circuit and the copper plate surface is used to conduct heat.The thermally conductive resin also acts as an insulator.
However, because the thermal conductivity of this layer of thermal conductive adhesive is negligible compared to copper, it cannot maximize the heat dissipation advantages of copper plates. Conventional copper substrate construction (left image below) is not an ideal solution for heat dissipation, and copper substrates made using a thermoelectric separation process are more popular (right image below). This structure allows the bottom of the heat dissipation device to directly contact the copper plate, and it is conceivable that the heat dissipation effect is particularly good.
Because of its excellent heat dissipation performance, copper PCBs are mainly used in products with extremely high heat dissipation requirements, such as stage lights, projectors, and automotive headlights.
Therefore, at the beginning, the copper plate needs to be selectively etched to form a bump, and then pressed with the copper foil through the thermally conductive adhesive after selective hollowing, and the subsequent process is the same as that of an ordinary PCB.