4 Layer High Frequency PCB Built On 20mil RO4350B With Back Drilling Hi, This is a type of 4 Layer Rogers PCB built on 20mil (0.508mm) RO4350B with Tg 280°C for the application of GPS tracker. Multilayer PCB's on Rogers material have different structure (stack up) from FR-4 multilayer PCB's, because the core of Rogers material is semi-manufactures. For this 4 layer high frequency PCB, it uses 2 cores of 20mil RO4350B. Usually blind via from layer 1 to layer 3 is hard to be drilled. On the other hand, the back drill technology can solve this problem of signal integrity. Basic specifications Base material: RO4350B 20 mil + RO4450B 4 mil Layer count: 4 layers Type: Mixed multiplier milled separately Format: 300mm x 182mm = 5 types = 8 pieces Surface finish: Immersion gold Copper weight: Outer layer 35 um/ Inner layer 18 um Solder mask / Legend: Green / white Final PCB height: 1.42 mm Standard: IPC 6012 Class 2 Packing: Each 25 panels are packed for shipment. Lead time: 12 working days Shelf life: 6 months Application Multiplexer, Video transmission gear, Low noise block, Power divider Stack up, 4 Layer Contact us today for more preferential price. Best regards Bonnie Shi | Business development Bicheng PCB | sales28@bichengpcb.com |Material partners: Rogers, ITEQ, SHENGYI, TAIYO, KUANGSHUN If you do not want to receive emails from Bicheng about marketing communications and special offers, reply as “remove” in the subject line. Bicheng is located at Baoan, Shenzhen, China 518103