US 2017/0318667 A1Published application

Wiring board and electronic device

AssigneeFujitsu Limited

InventorKenichi KAWAI

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Abstract

A wiring board includes a first wire, a second wire, a third wire and a fourth wire formed over a substrate and extending in a first direction respectively, the second wire being adjacent to the first wire in the first direction, and the third wire being adjacent to the first wire in a second direction orthogonal to the first direction, and the fourth wire being adjacent to the second wire in the second direction, a pair of fifth wires, a pair of sixth wires, a pair of seventh wires and a pair of eighth wires formed in the substrate and extending in the second direction respectively, a pair of ninth signal vias, a pair of tenth signal vias, a pair of eleventh signal vias and a pair of twelfth signal vias formed in the substrate and extending in a third direction orthogonal to a surface of the substrate respectively.

Claims20

Dependent claims

A wiring board comprising:

a first wire, a second wire, a third wire and a fourth wire formed over a substrate and extending in a first direction respectively, the second wire being adjacent to the first wire in the first direction, and the third wire being adjacent to the first wire in a second direction orthogonal to the first direction, and the fourth wire being adjacent to the second wire in the second direction;
a pair of fifth wires, a pair of sixth wires, a pair of seventh wires and a pair of eighth wires formed in the substrate and extending in the second direction respectively;
a pair of ninth wires, a pair of tenth wires, a pair of eleventh wires and a pair of twelfth wires formed in the substrate and extending in a third direction orthogonal to a surface of the substrate respectively, wherein
the pair of ninth wires couple a first end and a second end of the first wire to the pair of fifth wires, respectively, the pair of tenth wires couple a first end and a second end of the second wire to the pair of sixth wires, respectively, the pair of eleventh wires couple a first end and a second end of the third wire to the pair of seventh wires, respectively, and the pair of twelfth wires couple a first end and a second end of the fourth wire to the pair of eighth wires, respectively.

1 more element

An electronic device, comprising:

a wiring board;
a differential signal transmission circuit formed over the wiring board and being configured to output a pair of differential signals;
and
a differential signal reception circuit formed over the wiring board and being configured to receive the pair of the differential signals, wherein
the wiring board includes:
a first wire, a second wire, a third wire and a fourth wire formed over a substrate and extending in a first direction respectively, the second wire being adjacent to the first wire in the first direction, and the third wire being adjacent to the first wire in a second direction orthogonal to the first direction, and the fourth wire being adjacent to the second wire in the second direction,
a pair of fifth wires, a pair of sixth wires, a pair of seventh wires and a pair of eighth wires formed in the substrate and extending in the second direction respectively,
a pair of ninth wires, a pair of tenth wires, a pair of eleventh wires and a pair of twelfth wires formed in the substrate and extending in a third direction orthogonal to a surface of the substrate respectively, the pair of ninth wires coupling a first end and a second end of the first wire to the pair of fifth wires, respectively, the pair of tenth wires coupling a first end and a second end of the second wire to the pair of sixth wires,
respectively, the pair of eleventh wires coupling a first end and a second end of the third wire to the pair of seventh wires, respectively, and the pair of twelfth wires coupling a first end and a second end of the fourth wire to the pair of eighth wires, respectively, and
a first conductive layer, a second conductive layer, a third conductive layer and a fourth conductive layer formed on the first wire, on the second wire, on the third wire, and on the fourth wire, respectively,
the pair of fifth wires and the pair of seventh wires are a first signal transmission line configured to transmit a first signal that is one of the pair of differential signals,
the pair of sixth wires and the pair of eighth wires are a second signal transmission line configured to transmit a second signal that is another one of the pair of differential signals,
the first conductive layer and the third conductive layer form a first capacitor formed on the first signal transmission line and configured to remove a direct-current component of the first signal, and
the second conductive layer and the fourth conductive layer form a second capacitor formed on the second signal transmission line and configured to remove a direct-current component of the second signal.

11 more elements

Dependencies are inferred from the claim text.