Application of magnetic pulse welding technique for flexible printed circuit boards (FPCB) lap joints

The magnetic pulse welding (MPW) is a high speed solid state welding process which has been used successfully to provide metallurgical and electrical bonds between flexible printed circuit board (FPCB) with using: (1) welding with aluminum driver sheet and (2) without driver sheet. The optimum bank energy for reliable bonding was about 1 kJ with 160–180 kA maximum current. The maximum tensile shearing for most welded samples was nearly same as tensile shearing strength of copper layer of FPCB sheet.

► The feasibility of magnetic pulse welding (MPW) technique for welding of the flexible printed circuit board (FPCB) lap-joints has been investigated.
► The bonding of the FPCB lap-jointing using MPW can improve the long-term reliability with lower manufacturing cost.
► The FPCB was successfully jointed to each others using Aluminum driver sheet.
► The optimum bank energy for reliable bonding was about 1 kJ with 160 kA maximum current.