美联新材：EX电子材料位于PCB产业链的上游环节

Group 1 - The core viewpoint of the article highlights that Meilian New Materials' subsidiary, Huihong Technology, produces EX electronic materials, which are essential for high-end copper-clad laminates [2] - EX electronic materials are primarily used in the dielectric layer of high-frequency copper-clad laminates, indicating their significance in the PCB manufacturing process [2] - Copper-clad laminates are identified as a fundamental core material in PCB manufacturing, positioning EX electronic materials in the upstream segment of the PCB industry chain [2]