Wiring board
AssigneeKYOCERA Corporation
InventorHiroshi Takeuchi
Life of this patent
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Abstract
A wiring board according to the present disclosure includes a core board including an upper surface, a lower surface, a through-hole penetrating from the upper surface to the lower surface, and a plurality of glass fibers located inside, and a through-hole conductor located in the through-hole. The through-hole conductor includes a first portion located on an inner wall of the through-hole, and second portions connected to the first portion and located inside the glass fibers. The second portions include portions in a first direction and a second direction intersecting the first direction in a planar direction of the core board, the portions having a shorter length in the planar direction from the inner wall of the through-hole than portions, of the second portions, in directions other than the first direction and the second direction.
Claims6
A wiring board comprising:
- a core board comprising an upper surface, a lower surface, a through-hole penetrating from the upper surface to the lower surface, and a plurality of glass fibers located inside;
- a through-hole conductor located in the through-hole, wherein
- the through-hole conductor comprises a first portion located on an inner wall of the through-hole, and a second portion connected to the first portion and extended inside the glass fibers from the inner wall of the through-hole,
- the second portion comprise protrusions located in an intersecting direction where a first direction and a second direction intersect each other in a planar direction of the core board, and protrusions located in other directions than the intersecting direction,
- the protrusions located in the intersecting direction extend from the inner wall in the first direction and the second direction intersecting each other in the plane direction of the core board, the protrusions located in the other directions extend from the inner wall in the planar direction other than the first direction and the second direction, and a length of the protrusions located in the intersecting direction is shorter than a length of the protrusions in the other directions in the planar direction.
Dependencies are inferred from the claim text.