Patent ID: 11935822
Assignee: IBIDEN CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A wiring substrate, comprising:
a resin insulating layer;
a via conductor formed in the resin insulating layer such that the via conductor is penetrating through the resin insulating layer;
a conductor pad formed on the resin insulating layer and connected to the via conductor;
a coating insulating layer formed on the resin insulating layer such that the coating insulating layer is covering the conductor pad; and
a metal post formed directly on the conductor pad and protruding from the coating insulating layer such that the metal post is reduced in diameter from a base end side connected to the conductor pad toward an opposite side with respect to the base end side,
wherein the conductor pad is formed such that a central axis of the conductor pad is shifted in a predetermined direction with respect to a central axis of the via conductor, and the metal post is formed on a surface of the conductor pad such that a central axis of the metal post is shifted in the predetermined direction with respect to the central axis of the conductor pad, the metal post is positioned over the via conductor and overlapping with the central axis of the via conductor and the via conductor is positioned below the metal post and overlapping with the central axis of the metal post.