If you have questions about our products you own, Fill out the form below and we will answer any questions you have. Tips: Fields marked with*are required. Heavy Copper PCBHeavy Copper PCB Manufacturing Copper core circuit boards are a type of metal core PCB. With their layered design using a copper base, these PCBs offer superior thermal conductivity. Unitepcb has cust ... Attachment:*Verify Human: Which is bigger, 6 or 8?