LED has advantages of small size, low power consumption, long life, environmental protection, it widely used in display, lighting, transportation, electronic devices and other industry. Then how to manufacture LED PCB with double sided aluminum plate? We just master the method and be careful in the manufacturing process, it will be OK.
1.Machining: the aluminum plate can be drilled, but there has no glitch in the hole after drilling, this will affect the voltage test. After the shape rushed, the edge need neat without any burr, do not hit the solder layer edge, and board warpage should be less than 0.5%.
2.Do not rub the aluminum surface in the whole production process, it will produce surface discoloration, black by hand touch or chemical, this is unacceptable absolutely. Some companies use passivation process, some paste on the protective film before or after hot air leveling.
3.Over high voltage test: communication power aluminum plate need 100% high voltage test, voltage need 1500V, 1600V, time is 5 seconds, 10 seconds, 100% Printed Circuit Board testing.