This option in our website is the parameter for the top and bottom circuit layers only. For inner layers, the copper weight is 0.5oz.
Greater copper weight will make your board have better electrical properties but it will also increase the difficulty in etching the boards. For most general circuits, 1oz copper weight is sufficient. For batch production, please make sure the minimum track and spacing meet the following specification.
|Copper weight||The Min Track/Spacing for online quotation|
|Copper weight||The Min Track/Spacing for offline quotation|