What are the types of PCB surface treatment processes?

 

With the quick development of modern digital information technology, PCB manufacturing technology has actually also transformed greatly, and the demands for item modern technology are getting greater and higher. Similar to the circuit card in mobile phones and computers currently, some use gold and copper, that makes the advantages and negative aspects of motherboard more apparent.

Top quality PCB helps everyone to recognize the surface innovation on printed circuit card and contrasts the benefits and downsides of different PCB surface treatment processes and applicable scenarios.

From the appearance of the board processed by PCB, its appearance mainly has three colors:
gold-silver-light red. Regarding classification, gold is the most costly, silver is 2nd, and the most affordable is light red. It is easy to see from the appearance whether the manufacturer has actually cut edges. The parts of the circuit board are mostly pure copper, described as bare copper board.

1. The advantage of bare copper board is that the cost is fairly low, the surface area is flat, and its
weldability is better without oxidation. However be careful not to be affected by acid and temperature.
Copper is very easy to oxidize in the air after being positioned for a long period of time.

2. The gold on the immersion gold board is gold. Even if only a thin layer of conductor is layered, the
price of this has made up 10% of the expense of the entire circuit card. After immersion in gold
therapy, it is challenging to oxidize, can be stored for a very long time, and has a smoother surface.
It appropriates for welding some fine-gap pins and some gadgets with smaller solder joints, such as
mobile phone boards. Its cost is fairly high and the welding stamina is fairly bad.

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