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What is the difference between metal usages and film area in PCB Editor?

hetban

hellow,

I find the copper residual rate using metal usage or film area. (tools-metal usage , tools-quick reports-film area)
But, The results of the two methods are different.

So I wonder about the logic that both methods calculate the residual rate.
If anyone knows, please reply.

I wonder what the film area short report is.


Metal Usage Report
-> Calculate metal residue of layer
-> The Metal Usage Report accurately assesses the percentage of metal in a specified region of the design

Film Area Report
The metal percentage calculation takes place as follows:
-> If the board outline is added as a shape then the metal percentage is calculated between copper and board outline.
-> If the board outline is drawn with lines then the metal percentage is calculated between copper and route keep-in. However, if the route keep-in is not defined, metal percentage is not reported.
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