... finish:immersion gold/silver,OSP Solder mask: black Silk screen:white Min line width and space: 8mil Port: Shenzhen or HongKong Package ... Arlon or RF35-TC from Taconic, thickness 30 mils, only top solder, no silk screen, immersion gold finish, qty 150 pcs ... , medical, aerospace and defense, and other high-tech fields.Parameter Line width control: ±0.02mm Hole copper thickness: ≥ 20μм Thermal ...