崇达技术：批量交付的高多层产品主要集中在28~40层左右，70层高多层板处于样品阶段

Group 1 - The company, Chongda Technology, is currently able to deliver high-layer PCB products in the range of 28 to 40 layers based on customer demand [2] - The company is in the sample stage for 70-layer high multilayer boards, which are primarily used in communication equipment, servers, and aerospace [2] - The company is actively advancing the technical development of high-speed products such as 112G and 224G, with relevant technological achievements in server high multilayer PCBs recognized as "domestically leading" [2] Group 2 - The company's R&D achievements have been implemented in key production bases, including the Zhuhai No. 2 factory [2] - Specific technical parameters can be referenced in the company's disclosed periodic reports [2]