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]

Core Viewpoint - Defu Technology (301511) has successfully achieved stable mass production of its self-developed 3um ultra-thin carrier copper foil, RTF1-3 generation copper foil, and HVLP1-3 generation copper foil, marking a significant step in domestic substitution for these products [1] Group 1 - The company has developed and is now supplying 3um ultra-thin carrier copper foil [1] - RTF1-3 generation copper foil has also reached stable mass production [1] - HVLP1-3 generation copper foil is being supplied in stable quantities [1]

Core Viewpoint - Defu Technology (301511.SZ) has successfully achieved stable mass supply of its self-developed 3um ultra-thin carrier copper foil, RTF1-3 generation copper foil, and HVLP1-3 generation copper foil, marking a significant step in domestic substitution for these products [1] Group 1 - The company has developed and is now supplying 3um ultra-thin carrier copper foil [1] - The RTF1-3 generation copper foil has also reached stable mass production [1] - HVLP1-3 generation copper foil is now being supplied in bulk [1]

Core Viewpoint - The company 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 1 - The company has developed 3um ultra-thin carrier copper foil, RTF1-3 generation copper foil, and HVLP1-3 generation copper foil [1] - These products have reached stable mass supply, indicating successful production capabilities [1] - The achievement signifies a move towards domestic substitution in the copper foil market [1]