Patent ID: 11877394
Assignee: TOPPAN HOLDINGS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A glass core multilayer wiring board, comprising:
a glass substrate including a first surface, a second surface facing away from the first surface, and a through hole having a diameter which decreases from the first surface toward the second surface;
a through electrode located along a side wall of the through hole; and
a first layer structure formed on the first surface of the glass substrate and a second layer structure formed on the second surface of the glass substrate, wherein
the second layer structure is formed to close an opening of the through hole in the second surface to define a bottom section of the through hole, and wherein
the through electrode includes three layers,
a first layer of the three layers being located on part of the side wall of the through hole closer to the first surface and on part or all of the bottom section of the through hole in the second surface closing the opening of the through hole in the second surface,
a second layer of the three layers being located to cover the first layer, the side wall of the through hole exposed from the first layer, and the bottom section of the through hole in the second surface, and
a third layer of the three layers being located on the second layer.