主权项 |
1. A manufacturing method of a circuit structure, comprising:
providing a metal layer, the metal layer having an upper surface; forming a surface passivation layer on the upper surface of the metal layer, the surface passivation layer exposing a portion of the upper surface of the metal layer, a material of the metal layer being different from a material of the surface passivation layer; and forming a covering layer on the surface passivation layer, the covering layer covering the surface passivation layer. |