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US 8,013,427 B2Granted
Wiring board and electrical signal transmission system
AssigneeKYOCERA Corporation
InventorMaraki Maetani
Life of this patent
Estimating the term…
Abstract
A wiring board equipped with differential lines which compensate for differences in via lengths to minimize signal deterioration is disclosed. Two conductors are couple to different substrate levels through vias of different lengths. Compensation means are provided to correct for the phase difference caused by the different lengths.
Claims16
A wiring board comprising:
- a dielectric substrate;
- a first line comprising a first line conductor formed in the dielectric substrate and a first via conductor formed from one end of the first line conductor to a first main surface of the dielectric substrate;
- and
- a second line comprising:
- a second line conductor formed in the dielectric substrate, a part of the second line conductor being aligned with the first line conductor,
- an electric signal having opposite phase to an electric signal supplied to the first line conductor being supplied to the second line conductor, and
- a second via conductor formed from one end of the second line conductor to the first main surface of the dielectric substrate, the second via conductor being longer than the first via conductor, an electrical length of the second line being equal to an electrical length of the first line.
4 more elements
An electric signal transmission system comprising:
- a wiring board comprising:
- a dielectric substrate;
- a first line comprising:
- a first line conductor formed in the dielectric substrate and a first via conductor formed from one end of the first line conductor to first main surface of the dielectric substrate;
- and
- a first surface layer line conductor provided along the first main surface of the dielectric substrate, one end of the first surface layer line conductor is electrically coupled to the first via conductor;
- a second line comprising:
- a second line conductor formed in the dielectric substrate, a part of the second line conductor being aligned with the first line conductor,
- an electric signal having opposite phase to an electric signal supplied to the first line conductor being supplied to the second line conductor, and
- a second via conductor formed from one end of the second line conductor to the first main surface of the dielectric substrate, the second via conductor being longer than the first via conductor, an electrical length of the second line being equal to an electrical length of the first line;
- a second surface layer line conductor provided along the first main surface of the dielectric substrate, a part of the second surface layer line conductor being aligned with the first surface layer line conductor, one end of the second surface layer line conductor is electrically connected to the second via conductor;
- and
- a semiconductor integrated circuit electrically coupled to the first surface layer line conductor and the second surface layer line conductor.
10 more elements
Dependencies are inferred from the claim text.