Patent US5030800A successfully refreshed from Google Patents.
US5030800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed wiring board with an electronic wave shielding layer
Assignee: Nippon CMK Corp
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Filing: 1990-01-26
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Granted: 1991-07-09
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Expires: 2010-01-26
Abstract
Abstract A printed wiring board for use in an integrated circuit is disclosed. The printed wiring board comprises an insulating sheet having a connecting through hole portion including a possible plated through hole, a printed wiring circuit provided on one or both surface of the insulating sheet, an insulating layer provided on a part of the printed wiring circuit, an electromagnetic wave shielding layer provided on the insulating layer and a part of the printed wiring circuit, a solder resist provided on the electromagnetic wave shielding layer and a sealing member of heat-resistant material or weather-resistant material which is filled or packed in the connecting through hole portion.
Inventors
- 👤 Shin Kawakami
- 👤 Satoshi Haruyama
- 👤 Hirotaka Okonogi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:53
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: 10
Claim 1
Independent Claim
100 words
A printed wiring board comprising: an insulating sheet having a connecting through hole portion for providing an electrical connection, a sealing member in the through hole portion, a printed wiring circuit on at least one surface of the insulating sheet, an insulating layer provided on a part of the printed wiring circuit and over the through hole portion with the sealing member therein, a continuous electromagnetic wave shielding layer provided on the insulating layer and a part of the printed wiring circuit and thereby over the through hole portion, and a solder resist provided on the electromagnetic wave shielding layer.
Claim 2
Dependent Claim
100 words
A printed wiring board comprising: an insulating sheet having a connecting through hole portion for providing an electrical connection, a sealing member in the through hole portion, a printed wiring circuit on at least one surface of the insulating sheet, an insulating layer provided on a part of the printed wiring circuit and over the through hole portion with the sealing member therein, a continuous electromagnetic wave shielding layer provided on the insulating layer and a part of the printed wiring circuit and thereby over the through hole portion, and a solder resist provided on the electromagnetic wave shielding layer.
Claim 3
Dependent Claim
18 words
A printed wiring board as claimed in claim 1; wherein the sealing member is a thermosetting synthetic resin.
Claim 4
Dependent Claim
38 words
A printed wiring board as claimed in claim 1, wherein the sealing member is a conductive synthetic resin including carbon, silver, copper or the like, thereby connecting printed wiring circuit provided on both surfaces of the insulating sheet.
Claim 5
Dependent Claim
18 words
A printed wiring board as claimed in claim 1, wherein the sealing member is a photosetting synthetic resin.
Claim 6
Dependent Claim
74 words
A printed circuit board comprising: an insulating substrate having two main surfaces, conductors on at least one main surface and at least one through-hole for providing electrical conduction from one surface to the other; a sealing member in the at least one through-hole; a continuous insulating layer covering a portion of the conductors and the through-hole; and a continuous electromagnetic wave shielding layer covering the insulating layer and thereby the at least one through-hole.
Claim 7
Dependent Claim
74 words
A printed circuit board comprising: an insulating substrate having two main surfaces, conductors on at least one main surface and at least one through-hole for providing electrical conduction from one surface to the other; a sealing member in the at least one through-hole; a continuous insulating layer covering a portion of the conductors and the through-hole; and a continuous electromagnetic wave shielding layer covering the insulating layer and thereby the at least one through-hole.
Claim 8
Dependent Claim
18 words
A printed circuit board as claimed in claim 5, wherein the sealing member comprises a thermosetting synthetic resin.
Claim 9
Dependent Claim
18 words
A printed circuit board as claimed in claim 5, wherein the sealing member comprises a photosetting synthetic resin.
Claim 10
Dependent Claim
25 words
A printed circuit board as claimed in claim 5, wherein the sealing member comprises a conductive synthetic resin including carbon, silver, copper or the like.
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) | 1994-07-08 | 1995-01-07 | 1995-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-08 | 1999-01-07 | 1999-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-08 | 2003-01-07 | 2003-07-09 | $7700.00 | Window Closed / Lapsed |