The Influence of Pre-layer Processing on the Signal Integrity of 5G High Frequency Communication Multilayer LCP Lines

Liquid crystal polymer (LCP) high-speed films are widely used in the fields of 5G antennas and high-frequency devices. Multi-layer LCP circuit lamination pre-treatment process will bite the circuit, resulting in increased circuit surface roughness. Due to the skin effect, the insertion loss of the LCP multilayer circuit also increases, thereby affecting signal integrity. The effect of pre-processing technology on the performance of multilayer LCP circuits is studied. We found that the browning process has a greater impact on signal integrity.