US5028743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed circuit board with filled throughholes
Assignee: Nippon CMK Corp
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Filing: 1990-01-26
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Granted: 1991-07-02
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Expires: 2010-01-26
Abstract
Abstract A double sided or multi-layered printed circuit board comprises an insulating substrate having conductors on opposed major surfaces thereof which are electrically connected together via a through-hole. A sealing member composed of conductive resin fills the through-hole. An insulating layer covers the conductors and sealing member, and an electronic wave-shielding layer covers the insulating layer.
Inventors
- 👤 Shin Kawakami
- 👤 Satoshi Haruyama
- 👤 Hirotaka Okonogi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:17
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/002; H05K9/0039; H05K1/00; H05K1/02; H05K1/0213; H05K1/0216; H05K1/0218; H05K3/00; H05K3/0094; H05K3/46; H05K3/4602; H05K2201/00; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0215; H05K2201/07; H05K2201/0707; H05K2201/0715; H05K2201/09; H05K2201/09209; H05K2201/095; H05K2201/09536; H05K2201/0959; H05K3/40; H05K3/4038; H05K3/4053; H05K3/4069
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
A multi-layered printed circuit board comprising an insulating substrate with two surfaces with at least one through-hole, conductors on the substrate, means for providing conduction from one surface of the substrate to the other via the at least one through-hole, a heat and weather-resistant sealing member completely filling that at least one through-hole, an insulating layer over the conductors and the at least one through-hole, and an electronic wave-sheilding layer over the insulating layer.
Claim 2
Dependent Claim
74 words
A multi-layered printed circuit board comprising an insulating substrate with two surfaces with at least one through-hole, conductors on the substrate, means for providing conduction from one surface of the substrate to the other via the at least one through-hole, a heat and weather-resistant sealing member completely filling that at least one through-hole, an insulating layer over the conductors and the at least one through-hole, and an electronic wave-sheilding layer over the insulating layer.
Claim 3
Dependent Claim
18 words
A printed circuit board according to claim 1, wherein said sealing member comprises a thermosetting-type synthetic resin material.
Claim 4
Dependent Claim
25 words
A printed circuit board according to claim 1, wherein the means for providing conduction comprises said sealing member composed of a conductive synthetic resin material.
Claim 5
Dependent Claim
18 words
A printed circuit board according to claim 1, wherein said sealing member comprises a photosetting-type synthetic resin material.
Claim 6
Dependent Claim
20 words
The printed circuit board according to claim 1, wherein the multi-layered printed circuit board comprises a double-sided printed circuit board.
Claim 7
Dependent Claim
71 words
A multi-layered printed circuit board comprising: an insulating substrate having two main surfaces with conductors thereon and at least one through-hole for providing electrical connection between conductors on the two main surfaces; a sealing member completely filling the at least one through-hole; an insulating layer covering the conductors and the at least one through-hole on both main surfaces; and an electronic wave-shielding layer covering the insulating layer on both main surfaces.
Claim 8
Dependent Claim
71 words
A multi-layered printed circuit board comprising: an insulating substrate having two main surfaces with conductors thereon and at least one through-hole for providing electrical connection between conductors on the two main surfaces; a sealing member completely filling the at least one through-hole; an insulating layer covering the conductors and the at least one through-hole on both main surfaces; and an electronic wave-shielding layer covering the insulating layer on both main surfaces.
Claim 9
Dependent Claim
18 words
The printed circuit board according to claim 6, wherein said sealing member comprises a photosetting-type synthetic resin material.
Claim 10
Dependent Claim
18 words
A printed circuit board according to claim 6, wherein said sealing member comprises a thermosetting-type synthetic resin material.
Claim 11
Dependent Claim
20 words
The printed circuit board according to claim 6, wherein the sealing member is composed of a conductive synthetic resin material.
Claim 12
Dependent Claim
20 words
The printed circuit board according to claim 6, wherein the multi-layered printed circuit board comprises a double-sided printed circuit board.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |