... : FR-4, CEM-3, Teflon, Aluminum Substrate, Rogers, Halogen Free, High Tg4.Copper Thickness: 140micron(4oz)5.Min Board Thickness ... NPTH): ±0.05mm20.Outline Tolerance (CNC): ±0.13mm21.Surface coating: Lead Free HAL, HAL, Flash Gold, Immersion Gold, Immersion Tin, Immersion Silver ... to us for further reference.-In order to shorten the lead time,please advise us acceptable components for substitution. High ...