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Multilayer pcb

Multilayer pcb
Issue Time:2017-09-01
Multilayer PCB can be defined as a printed circuit board that has more than two copper layers, such as 4L, 6L, 8L, 10L, 12L, etc. Comparing to double-sided with two conductive layers of material, all multilayer PCBs must have at least  three layers of conductive material, which are buried in the center of the material.

With the improvement and development of technology, people can put more and more copper layers on the same board. Currently, we can produce 2L-30L FR4 MultiLayer PCB.

 For example, there is a kind of multilayer PCB--12layer 2oz PCB Board layer stack up:

-----------------1.5oz   L1

1080*2116  6.5mil        
-----------------        L2

|   0.18mm   2oz |
-----------------        L3

1080*2116  6.5mil
-----------------        L4

|   0.18mm   2oz | 
-----------------        L5

1080*2116  6.5mil
-----------------        L6

|   0.18mm   2oz |
-----------------        L7

1080*2116  6.5mil
-----------------        L8

|   0.18mm   2oz |
-----------------        L9

1080*2116  6.5mil
-----------------        L10

|   0.18mm   2oz |
-----------------        L11

1080*2116  6.5mil
-----------------1.5oz   L12

 Lamination thickness:1.9+/-0.15MM

compared to single or double-sided PCBs, multilayer pcb has many benefits, such as:
Having higher assembly density 
Having Smaller size (considerable savings on space)
Increasing  flexibility
More Easier incorporation controlled impedance features.
Reducing the need for interconnection wiring harnesses
Reducing overall weight
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