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Why are printed circuit boards made of aluminum?
Aluminum in printed circuit boards is used when good cooling of the device is required or to transfer heat from components on the board to an aluminum substrate and then to a fan or more powerful radiator. The addition of aluminum boards is the rigidity of the structure.
Many people think that soldering on aluminum boards is quite problematic; they come up with various nonsense about fluxes for aluminum. These people simply do not understand how an aluminum printed circuit board works.
Look.
That is, the aluminum printed circuit board on top is exactly the same as a regular printed circuit board, and soldering of such a board occurs in the same way in ovens with reflow profiles of lead or lead-free solder pastes. The soldering temperature depends on what kind of paste will be applied to the board and the slightly slow speed of the oven conveyor. It is almost impossible to heat and solder such a board manually with a hairdryer or soldering iron, because all the heat will instantly dissipate in the aluminum. And even if you increase the temperature to 500 degrees, it is unlikely that the conductors on the board will withstand such a thermal overload. PCB fabrication company list you can find in smt-industry.com search system.
This is the trick of these boards. If powerful LEDs for lighting are soldered onto them, a large amount of heat is released, which is dissipated by aluminum and then this heat is transferred either to the device body or to an additional radiator. This is necessary to increase the service life of the lamps and prevent them from overheating.
Aluminum boards are used for more than just lamps. They are used in cases where the components on the board generate a lot of heat and to prevent component failure, boards with an aluminum substrate are used.
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