扬帆新材：高性能飞秒激光直写双光子光刻胶的开发及应用等材料和技术，目前尚处于研发阶段

Group 1 - The company confirmed that it produces materials used in PCB (Printed Circuit Board) manufacturing, specifically photoresist materials [1] - The company is currently developing high-performance femtosecond laser direct-write two-photon photoresist, which is considered a critical material and technology, but it is still in the research and development stage and has a significant gap before industrial production can be achieved [1]