Homebrew PCBs

Here are the details for Cu thickness & clad weight:
 
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 thichness
1.0 oz means 35 µm copper thichness
2.0 oz means 70 µm copper thichness

Regards,
 
HughAW

  _____  

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Don Jackson AE5K
Sent: Wednesday, November 05, 2008 6:46 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Determining copper weight



A little different subject from most message traffic: Anyone know of a 
method to (hopefully easily) determine the copper weight on unetched 
material (probably FR-4)?

In my case, I've collected various pieces of copper clad board but have 
no idea if copper is 1/2 oz., 1 oz, or more.

Thanks,
Don


 


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