Study of co-fired multilayer structures based on Thick Printed Copper technology

•Electrical and mechanical parameters of co-fired multilayer Thick Printed Copper structures.•Evaluation of changes in electrical and mechanical parameters after thermal aging and cycling.•Cross-sections of different variants of co-fired multilayer structures. This paper is focused on the study of co-fired multilayer structures realized by Thick Printed Copper (TPC) technology. TPC technology is used for the manufacturing of substrates for power applications and it enables simple manufacturing of multilayer structures. These structures usually consist of two copper films separated by a dielectric film which are commonly fired individually. Co-firing of these films can reduce production costs and time. It does not deteriorate electrical parameters. The influence of co-firing of different film combinations on the inner structure, electrical and mechanical parameters and also the changes of these parameters after aging and thermal cycling are described in this paper.