LED Sign Board PCB is printed with high quality ink, with clear text and fresh patterns. The raw material is Class A military material. For the core material of the circuit board, the A grade military material is used, and the quality is very guaranteed. It has a variety of high-quality craftsmanship, such as gold-plated plates, double-sided gold finger red, blue and white color proofing. Combined with the advantages of high efficiency, energy saving and environmental protection of LED products, LED aluminum and circuit boards with fast heat conduction, high voltage, high voltage resistance and fast heat dissipation are produced.
FR-4,CEM-1,CEM-3,High TG,FR4 Halogen Free,FR-1,FR-2
Max.finished board side
Min.drilled hole size
HALS/HALS lead free,Chemical tin,Chemical Gold,
Solder mask color
Vacuum packing,Plastic bag
standard carton packing
16. providing OEM service to all sorts of printed circuit board assembly
The purpose of the immersion gold process is to deposit a nickel-gold coating with stable color, good brightness, smooth plating and good solderability on the surface of the LED Sign Board PCB. It can be basically divided into four stages: pre-treatment (de-oiling, micro-etching, activation, post-dipping), nickel-plating, immersion gold, post-treatment (waste gold washing, DI washing, drying).
The vertical tin-spraying process makes it difficult to flatten the fined pads, which makes it difficult to mount the SMT. In addition, the shelf life of the tinplate is very short. The gold plate just solves these problems.
The high-barrier vacuum packaging film of the PCB board can effectively prevent the oxidation of the PCB board and greatly prolong the service life of the product.