德福科技：公司自主研发的3um超薄载体铜箔等已批量稳定供货

Group 1 - The core viewpoint of the article is that Defu Technology (301511) has successfully achieved stable mass production of its self-developed ultra-thin carrier copper foil and various generations of copper foil products, marking a significant step in domestic substitution [1] Group 2 - The company has developed three types of copper foil products: 3um ultra-thin carrier copper foil, RTF1-3 generation copper foil, and HVLP1-3 generation copper foil [1] - The successful mass production of these products indicates a shift towards domestic manufacturing capabilities in the copper foil industry [1]