鑫科材料：公司现在铜箔带产品主要是青铜箔，黄铜箔，铜镍硅箔

Group 1 - The core product offerings of the company include bronze foil, brass foil, and copper-nickel-silicon foil [1] - Bronze foil is primarily used in board-to-board connectors and mobile phone SIM card slots [1] - Brass foil is utilized for heating elements, while copper-nickel-silicon foil is being developed for next-generation AI high-speed communication connectors [1]