Product name: four layer mixed laminated boardchina pcb suppliercharacteristic1. The use of fr4 + s1141 f4bm-2 plate mixed production. Which f4bm-2 for the l1-l2 material;2. Mixed lamination way greatly reduce cost. And can meet the need of high frequency signal;3. Different materials mixed in the production process of various aspects of the process capability is a relatively large test. specificationslayer count: 4board thickness: 1.20mmbase materials: f4bm-2 + s1141finished size: 246*29mmsurface finish: immersionline widthline space: 128milminimum hole: 0.30mmsolder resist color: sensitive greencu thickness: inner layer 1 oz outer layer 1.5 oz