A Review of Manufacturing Technology of 3D Conformal Electrically Conductive Circuits on the Surface of Dielectric Materials

Dielectric materials have been widely used in daily life and industrial fields because of their light weight, low cost, good mechanical properties and chemical stability. The fabrication of conformal electrically conductive circuit patterns on the surface of the dielectric materials can integrate mechanical and electrical functions, which not only further expands their application range, but also enables electronic products to develop in the directions of miniaturization, light weight, high integration, multi-functionality and low energy consumption. In this paper, the progress of the manufacturing technology of conformal electrically conductive circuit on the surface of dielectric materials was reviewed. The main manufacturing technologies included flexible membrane transfer, photolithography, inkjet printing, micro-pen direct writing, laser direct structuring, laser activation and metallization and transfer technology. And efficient fabrication of conformal electrically conductive circuit could be realized by adopting appropriate manufacturing process. The advantages and disadvantages of various manufacturing technologies for conformal electrically conductive circuit were compared, and the future development of conformal electrically conductive circuit was also prospected.