pcb copper board - copper thickness

[Wp100]

Hi,

Does anyone know what the copper thickness is on the many single sided boards you can buy from the mainly China based sellers on the usual sites ?

We bought a couple of the FR4 1.2mm single sided board but that seller and many others do not mention the copper thickness.
Are we right to assume they are more likely to be the thinner 1/2 oz /sqft, or even less ??

If we bought from CPC or RS they specify 1oz/sqft.

Also looked at Fortex though a £30 min order and MegaUK whos site seems unsuable the last few days ?

 

[For The Popcorn]

One ounce is the standard at most fabs.

 

[augustinetez]

1oz is the standard of all Chinese fabs unless you ask for something else (most only do 2oz as an option but some can do thicker on special request but it gets very expensive).

For reference:

1oz = ~35µm thick or 1.4 mils

2oz = 70µm thick or 2.8 mils

 

[rjenkinsgb]

The 1oz finish weight may only be after the through-hole plating stage - they may well start with 0.5oz copper clad laminate.

The plating has to be done before etching as that's when all holes will have electrical continuity to the surface copper, typically following an electroless plate starter, I believe.