Chongqing Qunwin Electronic Materials Co., Ltd. is deeply engaged in electronic packaging materials, building a reliable end-to-end system across R&D, production and quality control through continuous innovation, standardized manufacturing management and stable product quality. With multiple core patents, Qunwin has been recognized as a National High-tech Enterprise and a national SRCI "Little Giant" enterprise. Products are SGS-certified and the company holds IATF 16949, ISO 9001 and ISO 14001:2015 certifications—providing trusted materials for high-end electronics customers. From precision solder balls to copper core solder balls, micro-coil springs and other advanced Tin-based solders, Qunwin continues to strengthen its capabilities for semiconductor, consumer and automotive advanced packaging.