Typical Types of PCB

As we know there are many standards to specify PCB, such as material, function, construction and so on. Now here we classify PCB according to construction. There are typically three categories: Single Board, Double Sided Board and Multiple Sided Board.

Single Board

All PCBs have two sides, top and bottom. But single sided PCB means only one side has the conductive circuit that used to assemble components. The other side has no circuit. It was born at early 1950s, generally applied at radios, washer, automatic sales machine and all kinds of home or commercial machines. The biggest merit of single board is cheap but the design of circuit is demanding. Another thing is that it’s very easy to distinguish single sided PCB.

Double Sided Board

Now we may have clear idea what is double sided PCB. That means both side of PCB have conductive circuit, which have lots of plated vias and PADs on them. Double sided PCB is widely used in electronic products. They will be used to CD player, mouse, fan, TV and so on. Compared to single board, double sided board are relatively complicated, so will be used at more advanced fields. Also, it’s easy to distinguish double sided PCB. Usually we could see circuit on both sides.

Multiple PCB

We could see also has circuit on both sides of multiple PCB. But the difference between double sided PCB is that see by side face of PCB, we will find multiple PCB material has some black horizontal lines. Multiple PCB is much more complicated and expensive than above two. Generally, there are three methods to manufacture multiple sided boards: PTH, Clearance Hole and Build Up. PTH is the mainstream of multiple sides board manufacture. High reliability and assembly density are some merits of it. So it can be normally used at demanding high reliability and technology field, such as military, aerospace, medical machines, communications and so on.

Conclusion

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