Is one-half ounce RA copper more or less flexible than one ounce RA copper?
I prefer one ounce. One-half ounce is a little bit thinner and you can get the overall thickness of the circuit down a bit. My experience has been that one ounce copper is more robust and holds up a lot better. The change in thickness is really kind of negligible, less than a mil in overall thickness. I prefer a little more weight in the copper to give you a little tougher conductor. What features drive higher costs? The really big one is circuit size, because most circuits are panel based. That is how most manufacturers build them. The more circuits that are put on a panel, the less you pay per circuit. Layer count is another huge driver. The layer count and the circuit size are the two biggest cost drivers. Another cost driver would be feature size. As you start getting smaller pads, and when you get into multi-layers, the cost will increase. Etched features are usually not a problem until you get under four mils for line width and spacing, but if you get below that it can also becom
