Patent ID: 11903145
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A wiring board, comprising:
a core portion having a first surface and a second surface, which are opposite to each other; and
a first buildup portion on the first surface and a second buildup portion on the second surface, respectively,
each of the first buildup portion and the second buildup portion including a first insulating layer on the core portion, a wire pattern on the first insulating layer,
a second insulating layer on the first insulating layer to cover the wire pattern, and
a protection layer covering the second insulating layer,
the protection layer exposing a portion of the wire pattern,
the second insulating layer including a resin layer and fillers, the fillers being distributed in the resin layer and being formed of an inorganic material,
the fillers not being in the protection layer,
the resin layer of the second insulating layer and the protection layer being formed of a same material
the wire pattern of the first buildup portion being electrically connected to the wire pattern of the second buildup portion,
a degree of roughness of a top surface of the protection layer is greater than a degree of roughness of the second insulating layer, and
the top surface of the protection layer faces away from the core portion.