... Materials: FR-4, CEM-3, Teflon, Aluminum Substrate, Rogers, Halogen Free, High Tg4.Copper Thickness: 140micron(4oz)5.Min Board Thickness ... ±0.05mm20.Outline Tolerance (CNC): ±0.13mm21.Surface coating: Lead Free HAL, HAL, Flash Gold, Immersion Gold, Immersion Tin, Immersion Silver ... -to-concept and build-to-function orders.OEM and ODM service are welcome.-We also welcome any quantity prototype orders as ...