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US 6,787,710 B2Granted
Wiring board and a method for manufacturing the wiring board
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsYoshiaki Uematsu, Shinji Manabe
Life of this patent
Estimating the term…
Abstract
In holes formed in a multi-layer wiring board for transmitting differential signals, a first hole is formed, an insulating portion is formed by filling the first hole with an insulating resin, a pair of second holes is formed for transmitting the differential signals to the formed insulating portion, and the pair of second holes is arranged symmetrically each other with respect to a center axis of the first hole for forming a coaxial structure.
Claims16
A multi-layer wiring board comprising:
- a base board including two conductor layers, two insulating layers disposed between the two conductor layers, and at least one of a power layer and a ground layer disposed between the two insulating layers;
- a first hole, formed through the base board, including an insulating portion filled with an insulator;
- and
- a pair of second holes formed within the first hole through the insulating portion.
1 more element
A wiring board comprising:
- abase board;
- a first hole, formed through the base board, including an insulating portion filled with an insulator;
- and
- a pair of second holes formed within the first hole through the insulating portion, wherein a shortest length of the insulator filled between the pair of the second holes is shorter than a shortest length of the insulator filled between the first hole and one of the second holes.
1 more element
A wiring board comprising:
- a base board;
- a first hole, formed through the base board, including an insulating portion filled with an insulator;
- and
- a pair of second holes formed within the first hole through the insulating portion,
- wherein each of the second holes includes a conducting portion for transmitting a differential signal,
- wherein a shortest length of the insulator filled between the pair of the second holes is shorter than a shortest length of the insulator filled between the first hole and one of the second holes.
3 more elements
A wiring board comprising:
- a base board;
- a first hole, formed through the base board, including art insulating portion filled with an insulator;
- and
- a pair of second holed formed within the first hole through the insulating portion,
- wherein the pair of the second holes is located symmetrical to each other with respect to a center axis of the first hole for forming a coaxial structure,
- wherein a shortest length of the insulator filled between the pair of the second holes is shorter than a shortest length of the insulator filled between the first hole and one of the second holes.
3 more elements
Dependencies are inferred from the claim text.