福斯特：公司有用于AI载板图形蚀刻用的感光干膜产品，在下游PCB客户端有少量销售

Group 1 - The company does not produce AI substrates but offers photosensitive dry film products used for AI carrier board graphic etching, with limited sales to downstream PCB clients [2] - The company confirmed that it has not yet achieved mass production of AI substrates and is still in the customer verification phase [2] - The company is involved in the AI application sector through its products, although the extent of involvement is currently minimal [2]