The application discloses a manufacturing method of a ground performance
metal-based circuit board for an intelligent networked automobile. According to
design data, a substrate is manufactured, first drilling is performed, and carbon oil is filled, then first baking and curing are performed, a filling hole is formed, and a filling plate is formed on the whole plate; then
polishing is performed, a ground circuit pattern is manufactured on the surface
copper layer, and a
metal-based circuit board is formed on the whole plate through subsequent
processing; through the manufacturing method, the problem of hole wall
cracking and separation caused by the
thermal expansion and cold shrinkage difference of multi-layer materials of the substrate is effectively avoided in the method for forming a ground circuit by adopting an
electroplating hole in the prior art; meanwhile, the complex processes such as
copper deposition and
copper plating required in
electroplating are omitted, the
processing flow is simplified, the carbon oil material cost is lower than that of
silver paste and copper paste in the prior art, the material matching of the carbon oil with the circuit board body is better, the
electrical connection between the ground circuit and the
metal-based layer can be stably realized, and good ground performance is ensured.