Number of layers: 2 Surface finish: OSP Base material: FR4 Outer Layer W/S: 6/4mil Thickness: 1.0mm Min. hole diameter: 0.25mm Special process: impedance control+half hole Advantages Of 2 Layer OSP Impedance Control Half Hole PCB Own lamination process to convenient production for Multilayer PCB and shorten the lead time. Jiangxi facility is environmental-friendly approved by the government . Famous raw materials brand, Kingboard, Shengyi, ITEQ, Taiyo, Guangxin. Highly automated production line with AIO Optical Scanning, Electroplating Automatic Line, High-speed flying probe test machines and inkjet printer. Engineers with more than 15 years of experience Customers located in more than 20 countries, the common choice of 500 high-end companies. Perfect quality inspection system Professional R&D team can make all kinds of special boards. Quick turn, prototype, medium or large batches can be produced to meet the needs of different customers. Quick response to quotes. Now the price of osp pcb finish is reasonable, anything you need, please contact us. As a pcb manufacturing company, we can provide kinds of pcb boards for sale, if you are interested, please leave us a message.