<back  Copper Thickness

The copper in a PCB is rated in ounces, and represents the thickness of 1 ounce of copper rolled out to an area of 1 square foot.  For example a PCB that uses 1 oz. copper has a thickness of 1.4mils. 

 
1/2 oz. 0.7 mils
1 oz. 1.4 mils
2 oz. 2.8 mils

Copper Weight: it defines the number of ounce copper on 1 sq. ft. area, such as 0.5, 1.0, 2.0, 3.0 oz, etc. Usually this parameter is used to specify the thickness of the copper on each layer of the board. It is very easy to work out the thickness of 1.0 oz copper on 1 sq. ft. board based on the copper density (8.9 g/cm3), which is 34.29 µm and rounded up to 35 µm. So we have the following list.

0.5 oz means 17.5 µm copper thickness
1.0 oz means 35 µm copper thickness
2.0 oz means 70 µm copper thickness

Layer Count 0 - 8
 9 - 10 [5\5 trace\space]		 11 - 14 layers
 Poly Clad 370 HR
Finished CU weight
Outer Layers
Ground plane inner layers

Signal inner layers
Minimum space & trace
Outer layers
-
-
-


Inner Layers

 -
 1 oz min 3 oz max
 .5 oz min 2 oz max
 .5 oz min 2 oz max
-
 1 oz cu .005”
 2 oz cu .007”
 3 oz cu .010”
-

 .5 to 1 oz .005”
 2 oz cu .007"

 -
 4 oz
 4 oz
 4 oz
-
 1 oz cu <= .004"
 2 oz cu <= .005"
 3 oz cu <= .008"
 4 oz cu <= .010"


 2 oz cu <= .007"
 3 oz cu <= .010"
 4 oz cu <= .012"

 

for 2 Layer
1, H/H oz finished
2, 1/1 oz finished, we can use Hoz plated to 1oz.
3, 2/2 oz finished, and 3/3oz or 4oz/ 4oz
 
for 4 Layer
1, H/H/H/Hoz finished
2, 1/1/1/1oz finished
3, H/1/1/Hoz finished
4, 2/1/1/2oz finished
5, 2/2/2/2oz finished
6, 1/2/2/1 oz finished
7, 3 oz or 4oz as same
 
for 6 Layer
1, all Hoz finished
2, all 1oz finished
3, all 2oz finished
4, all 3oz or 4oz finished
5, H/1/1/1/1/H oz finished
6, 1/2/1/1/2/1 oz finished
7, 1/2/2/2/2/1oz finished
8, 2/1/1/1/1/2oz finished
 
for 8 Layer and 10 Layer  etc  according to 6 Layer to add the copper thickness are OK.