Circuit board assembly with recessed channels - has conducting paths hanging over transverse slots to prevent damage due to differential thermal expansion

摘要

The circuit board, for contacting incandescent lamps of motor vehicles, consists of an insulating board (1) with recessed channels (4, 5) passing across its conducting paths (2, 3). The conducting paths dip slightly into these channels as they cross them. The advantage lies in preventing the different coefficients of thermal expansion of the board and conductors from buckling and damaging the board.