PCB Heat Sink
Modern compact independent electronic systems require all the necessary entities embedded in the PCB. In addition to power, input and output ports and other important aspects, there should be an effective way to dissipate the heat generated by the components present in the PCB. Of course aluminum or sensitive system copper can be used as a radiator. But not all systems require a powerful heat sink, so eliminating the huge heat sink can greatly reduce the size of the final system.
If the LED lighting heat sink needs a large part, SMD LEDs are soldered directly to the PCB, then there is no space to install a full scale heat sink. Although small LEDs dissipate only a small amount of power, long-term use will reduce their service life.
The picture above illustrates a typical SMD LED soldered to the PCB. In this case, the heat has no path to be dissipated, thus the service life of LED is reduced. If the same situation occurs in a closed environment, the overall circuit is likely to be heated. This problem is not limited to LEDs, but all SMD packages with active components.
The solution to the above problem is simple but effective. Instead of installing the heat sink on the PCB, the flexible PCB is mounted on the heat sink. This is accomplished by etching the copper track on the thermally conductive fiberglass and attaching it to the heat sink itself. This offers a high heat dissipation and a normal PCB operation. PCB produced by this method has a higher structural strength than regular ones, and therefore it can be used even in a harsh environment.