博敏电子：当前公司生产的印制电路板最高可达68层（样品阶段），同时仍在不断研发更高层数的PCB产品

Group 1 - The company, Bomin Electronics (603936.SH), has confirmed that its printed circuit boards (PCBs) can currently reach a maximum of 68 layers during the sample phase [2] - The company is actively engaged in research and development to produce PCBs with even higher layer counts [2]