Source: http://www.google.com/patents/US7317166?dq=6,406,777
Timestamp: 2016-09-27 16:50:45
Document Index: 356020014

Matched Legal Cases: ['art.\n9', 'art 16', 'art 16', 'art 20', 'art 32', 'art 30', 'arts 32', 'art 32', 'art 36', 'art 38', 'arts 36', 'art 32', 'arts 36', 'art 32', 'art 32', 'arts 36', 'art 54', 'art 54', 'arts 56', 'arts 66', 'arts 66', 'art 58', 'art 54', 'art 58', 'art 54', 'art 54', 'arts 56', 'arts 66', 'art 54', 'arts 56', 'art 54', 'art 44', 'art 54', 'arts 56', 'arts 66', 'arts 84', 'arts 84', 'arts 50', 'art 44', 'art 54', 'art 54', 'art 90']

Patent US7317166 - Wiring base board, method of producing thereof, and electronic device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA wiring base board and a method of producing thereof relate to a wiring base board of a multilayer structure, and make it possible to perform various kinds of transmission modes such as differential transmission at via parts. For this wiring base board, an insulating substrate is used. The wiring base...http://www.google.com/patents/US7317166?utm_source=gb-gplus-sharePatent US7317166 - Wiring base board, method of producing thereof, and electronic deviceAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7317166 B2Publication typeGrantApplication numberUS 10/949,209Publication dateJan 8, 2008Filing dateSep 27, 2004Priority dateMay 10, 2004Fee statusPaidAlso published asCN1697593A, CN100367832C, US7549222, US20050247482, US20060118329Publication number10949209, 949209, US 7317166 B2, US 7317166B2, US-B2-7317166, US7317166 B2, US7317166B2InventorsNaoki NakamuraOriginal AssigneeFujitsu LimitedExport CitationBiBTeX, EndNote, RefManPatent Citations (8), Referenced by (23), Classifications (23), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetWiring base board, method of producing thereof, and electronic device
US 7317166 B2Abstract
1. A wiring base board, comprising:
a first via hole part that is formed in said insulating substrate and provides a plurality of first circumferential face parts; and
a plurality of second via hole parts, each providing a second circumferential face part arranged in a concentric circle pattern with one of the first circumferential face parts, each of said second via hole parts having a same central axis as one of the first circumferential face parts, said second via hole parts being formed in said first via hole part through an insulator,
said first and second circumferential face parts forming said concentric circle pattern with the same central axis being made into coaxial structure parts,
wherein each of said coaxial structure parts has an opposing face part where one of said first circumferential face parts of said first via hole part opposes to said second circumferential face part of one of said second via hole parts at an equal distance.
2. The wiring base board of claim 1 further comprising:
a first conductor part that is formed in an inner circumferential face of said first via hole part; and
a plurality of second conductor parts that are formed in said second via hole parts,
said second conductor parts opposite to said first conductor part on said circumferential face parts of said first via hole part being constituted as the coaxial structure parts.
3. The wiring base board of claim 1, wherein said insulator inside said coaxial structure parts is set to the same thickness.
4. The wiring base board of claim 1, wherein said insulator inside said coaxial structure parts is an organic material or an inorganic material.
5. The wiring base board of claim 1, wherein said second via hole parts are made into an air core, or are made into a non-air core by filling either a conductive material or a non-conductive material.
6. The wiring base board of claim 1, further comprising a guard pattern part that surrounds said second via hole parts.
7. The wiring base board of claim 2, wherein said first conductor part is made into a grounded conductor.
8. The wiring base board of claim 2, further comprising a guard pattern part that surrounds said second via hole parts, said second conductor parts being connected to said guard pattern part.
9. The wiring base board of claim 2, wherein said first and second conductor parts are a metal material or a conductive paste.
10. The wiring base board of claim 8, further comprising:
a conductor that connects between said guard pattern part surrounding said second via hole parts and said first conductor part formed inside said first via hole part; and
a penetration part in which said conductor is provided.
11. A wiring board unit including a wiring base board, said wiring base board comprising:
a plurality of second via hole parts, each providing a second circumferential face part arranged in a concentric circle pattern with one of said first circumferential face parts, each of said second via hole parts having a same central axis as any of the first circumferential face parts, said second via hole parts being formed in said first via hole part through an insulator,
wherein each of said coaxial structure parts has an opposing face part where one of said first circumferential face parts of the first via hole part opposes to said second circumferential face part of one of said second via hole parts at an equal distance.
12. An electronic device including a wiring base board, said wiring base board comprising:
a first via hole part that is formed in said insulating substrate and provides a plurality of circumferential face parts; and
13. An electronic device constituted by using a wiring base board for a back panel unit, said wiring base board comprising:
a plurality of second via hole parts, each providing a second circumferential face part arranged in a concentric circle pattern with one of the first circumferential face parts, each of said second via hole part having a same central axis as one of the first circumferential face parts, said second via hole parts being formed in said first via hole part through an insulator,
said first and second circumferential face parts forming said concentric circle pattern with the sane central axis being made into coaxial structure parts,
In cases where a guard pattern is provided in such a coaxial via structure, an explanation is given by referring to FIG. 4 through FIG. 6. FIG. 4 is a drawing showing a part of an upper face of a base board which has a coaxial via structure, FIG. 5 is a longitudinal sectional view of apart taken along line V-V of FIG. 4, and FIG. 6 is a transverse sectional view of a part taken along line VI-VI of FIG. 5. In this coaxial via structure, a GND guard pattern part 16 which surrounds the wiring pattern 12 is formed in an upper face part of the wiring base board 2. This GND guard pattern 16 and the GND wall 6 are electrically connected by forming a plurality of non-through holes 18 in a lower face side of the GND guard pattern part 16 and providing a conductor part 20 inside each non-through hole 18.
By the way, the wiring base board disclosed in the publication No. 2002-353588 has the following constitution. As shown in FIG. 9, a large-diameter conductor part 32 is formed in a via hole part 30, and conductor parts (plating parts) 36 and 38 are provided inside the conductor parts 32. Further, by providing an insulator 34 between these conductor parts, differential wiring is given. In the publication No. 2002-353588, it is mentioned to be a coaxial structure. However, a center Oa of the conductor part 32, a center Ob of the conductor part 36 and a center Oc of the conductor part 38 are set at different positions. Assuming that a distance (radius) from center Ob or Oc to outer face part of the conductor parts 36 or 38 is r, a distance R (=R1, R2, R3, . . . ) from each of the centers Ob and Oc to inner face part of the conductor part 32 differs by means of an angle θ (R1‡R2‡R3‡ . . . ). That is, a distance between an outer circumferential face part of the conductor parts 36 or 38 and an inner circumferential face part of the conductor part 32 differs by an angle. It is not said that the conductor part 32 and the conductor parts 36 and 38 differing in a center position as described above are the coaxial structure.
Furthermore, if the conductor part 54 is made into a grounded conductor by grounding the conductor part 54, stability against a noise in a transmission signal of the conductor parts 56 and 58 having the coaxial structure parts 66 and 68 is further heightened in addition to the stability of differential transmission against a noise. In the coaxial structure parts 66 and 68, the distance ro between the outer circumferential face part of the conductor part 58 and the inner circumferential face part of the conductor part 54 is equal distances, and the opposing circular faces having the same center are formed. Moreover, the distance ro between the outer circumferential face part of the conductor part 58 and the inner circumferential face part of the conductor part 54 is the shortest distance. Because of this, various kinds of electrical characteristics such as inductance, electrostatic capacity and characteristic impedance between the conductor part 54 and the conductor parts 56 or 58 are to be controlled by the coaxial structure parts 66 and 68.
Further, a conductor part 54 is constituted as a grounded conductor, and is formed as a grounded (GND) wall of the conductor parts 56 and 58 which constitute the parallel conductors. Furthermore, inside of the conductor part 54 formed at an inner wall part of the via hole part 44, an insulating layer 60 is formed by an insulator. Similarly to the first embodiment, the insulating layer 60 may also be formed with either of an organic material and an inorganic material. Since a thickness ti of the conductor part 54 is uniform and a thickness t2 of the conductor parts 56 and 58 is also uniform, a thickness t3 of the insulating layer 60 inside the coaxial structure parts 66 and 68 is also set equally.
As shown in FIG.15B and FIG.16A, in the substrate 43, two through hole parts 84 and 86 forming a real circle are formed by making the central axes O1 and O2 centers. Outside circumferential face parts of these through hole parts 84 and 86 come to constitute the circumferential face parts 50 and 52 described before.
As shown in FIG.15D, in this via hole part 44, a conductor part 54 is formed by using the plating of a metal, the spreading of a conductive paste, or a conductive material. An insulator composed of an organic material or an inorganic material is filled into a space part which is surrounded with the conductor part 54, and an insulating layer 60 is formed. On a surface side and a back face side of the substrate 43, substrates 92 and 94 composed of an insulating material which covers uniformly the insulating layer 60 are laminated, and a substrate 42 which is a multilayer substrate is constituted. In this embodiment, the insulating layer 60 and the substrates 92 and 94 are constituted by different members. However, it may also be constituted so that a resin including in the substrates 92 and 94 is poured into the elliptic-shaped through hole part 90 at the time of a press process, and so that the insulating layer 60 is constituted by that resin.
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