Wiring board and semiconductor device
AssigneeKioxia Corporation
InventorsYukifumi Oyama, Mitsumasa Nakamura, Yuichi Sano
Life of this patent
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Abstract
A wiring board includes a first wiring layer, a high-speed wiring disposed in the first wiring layer, a second wiring layer, and a signal wiring disposed in the second wiring layer. The signal wiring transmits a signal slower than that through the high-speed wiring. A third wiring layer between the first and second wiring layers includes a power supply wiring and/or a ground wiring, which is not disposed in a portion where a land of the first wiring layer and the signal wiring do not overlap. The power supply wiring and/or the ground wiring overlap the signal wiring in a portion where the land of the first wiring layer and the signal wiring overlap each other.
Claims17
A wiring board comprising:
- a first wiring layer including a first land for transmitting a first signal, a second land for transmitting a second signal different from the first signal, and a third land for transmitting a third signal different from the first signal and the second signal;
- a second wiring layer including a first signal line provided from the first land and a second signal line provided from the second land;
- a third wiring layer disposed between the first wiring layer and the second wiring layer and including a power supply wiring and/or a ground wiring,
- wherein when viewed from a plan view, a first portion of the power supply wiring and/or the ground wiring is disposed across the third land and overlaps the third land,
- when viewed from the plan view, a second portion of the power supply wiring and/or the ground wiring disposed across the third land, overlaps the third land, and (a) the second portion being physically separated from the first portion on the third land, and (b) the second portion is in a same layer as the first portion,
- when viewed from the plan view, the first portion and the first signal line overlap each other over the third land, and the second portion and the second signal line overlap each other over the third land.
Dependencies are inferred from the claim text.