US5416667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed wiring board having an electromagnetic wave shielding layer
Assignee: Nippon CMK Corp
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Filing: 1993-07-02
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Granted: 1995-05-16
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Expires: 2013-07-02
Abstract
Abstract A printed wiring board comprises a substrate, a printed wiring circuit formed on the substrate, and insulating layer formed on the printed wiring circuit, an electromagnetic wave shielding layer provided on the insulating layer, and an overcoat layer provided on the electromagnetic shielding layer. The electromagnetic shielding layer has a first color, and the overcoat layer has a second color different from the first color. The color of the overcoat layer may be any color which is easily visually distinguishable from the color of the electromagnetic wave shielding layer so that visual inspection of the working condition of the overcoat layer is facilitated.
Inventors
- 👤 Junichi Ichikawa
- 👤 Katsutomo Nikaido
- 👤 Shin Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:54
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/002; H05K9/0039; F; F42; F42B; F42B3/00; F42B3/10; F42B3/18; H01; H01Q; H01Q17/00; H05K1/00; H05K1/02; H05K1/0266; H05K1/0269; H05K1/0213; H05K1/0216; H05K1/0218; H05K2201/00; H05K2201/07; H05K2201/0707; H05K2201/0715; H05K2203/00; H05K2203/16; H05K2203/161; H05K3/00; H05K3/22; H05K3/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49126
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
70 words
A printed wiring board comprising: a substrate having a main surface; a printed wiring circuit disposed on the main surface of the substrate; an insulating layer disposed on the printed wiring circuit; an electromagnetic wave shielding layer provided on the insulating layer and having a first color; and an overcoat layer provided on the electromagnetic shielding layer and having a second color which is visually distinguishable from said first color.
Claim 2
Dependent Claim
70 words
A printed wiring board comprising: a substrate having a main surface; a printed wiring circuit disposed on the main surface of the substrate; an insulating layer disposed on the printed wiring circuit; an electromagnetic wave shielding layer provided on the insulating layer and having a first color; and an overcoat layer provided on the electromagnetic shielding layer and having a second color which is visually distinguishable from said first color.
Claim 3
Dependent Claim
18 words
A printed wiring board as claimed in claim 1; wherein the insulating layer also has the first color.
Claim 4
Dependent Claim
21 words
A printed wiring board as claimed in claim 1; wherein the first color is green and the second color is red.
Claim 5
Dependent Claim
15 words
A printed wiring board as claimed in claim 1; wherein the second color is red.
Claim 6
Dependent Claim
24 words
A printed wiring board as claimed in claim 1; wherein the electromagnetic shielding layer is provided on a portion of the printed wiring circuit.
Claim 7
Dependent Claim
21 words
A printed wiring board as claimed in claim 5; wherein the first color is green and the second color is red.
Claim 8
Dependent Claim
22 words
A printed wiring board as claimed in claim 1 wherein the electromagnetic shielding layer is provided on the entire printed wiring circuit.
Claim 9
Dependent Claim
21 words
A printed wiring board as claimed in claim 7; wherein the first color is green and the second color is red.
Claim 10
Dependent Claim
82 words
A printed wiring board comprising: a substrate having upper and lower surfaces; a printed wiring circuit formed on each of the upper and lower surfaces of the substrate; an insulating layer formed on each of the printed wiring circuits; an electromagnetic wave shielding layer provided on each of the insulating layers and having a first color; and an overcoat layer provided on each of the electromagnetic wave shielding layers and having a second color which is visually distinguishable from the first color.
Claim 11
Dependent Claim
82 words
A printed wiring board comprising: a substrate having upper and lower surfaces; a printed wiring circuit formed on each of the upper and lower surfaces of the substrate; an insulating layer formed on each of the printed wiring circuits; an electromagnetic wave shielding layer provided on each of the insulating layers and having a first color; and an overcoat layer provided on each of the electromagnetic wave shielding layers and having a second color which is visually distinguishable from the first color.
Claim 12
Dependent Claim
18 words
A printed wiring board as claimed in claim 8; wherein the insulating layers also have the first color.
Claim 13
Dependent Claim
21 words
A printed wiring board as claimed in claim 9; wherein the first color is green and the second color is red.
Claim 14
Dependent Claim
15 words
A printed wiring board as claimed in claim 9; wherein the second color is red.
Claim 15
Dependent Claim
25 words
A printed wiring board as claimed in claim 9; wherein each electromagnetic shielding layer is provided on a portion of the respective printed wiring circuit.
Claim 16
Dependent Claim
21 words
A printed wiring board as claimed in claim 13; wherein the first color is green and the second color is red.
Claim 17
Dependent Claim
22 words
A printed wiring board as claimed in claim 9; wherein each shielding layer is provided on the entire respective printed wiring circuit.
Claim 18
Dependent Claim
21 words
A printed wiring board as claimed in claim 15; wherein the first color is green and the second color is red.
Claim 19
Independent Claim
78 words
A method of manufacturing a printed wiring board, comprising the steps of: providing a substrate having upper and lower surfaces; forming a printed wiring circuit on at least one surface of the substrate; forming an insulating layer on the printed wiring circuit; forming an electromagnetic wave shielding layer having a first color on the insulating layer; and forming an overcoat layer having a second color which is visually distinguishable from the first color on the electromagnetic shielding layer.
Claim 20
Independent Claim
78 words
A method of manufacturing a printed wiring board, comprising the steps of: providing a substrate having upper and lower surfaces; forming a printed wiring circuit on at least one surface of the substrate; forming an insulating layer on the printed wiring circuit; forming an electromagnetic wave shielding layer having a first color on the insulating layer; and forming an overcoat layer having a second color which is visually distinguishable from the first color on the electromagnetic shielding layer.
Claim 21
Dependent Claim
25 words
A method of manufacturing a printed wiring board as claimed in claim 17; wherein the first color is green and the second color is red.
Claim 22
Dependent Claim
19 words
A method of manufacturing a printed wiring board as claimed in claim 17; wherein the second color is red.
Claim 23
Dependent Claim
22 words
A method of manufacturing a printed wiring board as claimed in claim 17; wherein the insulating layer also has the first color.
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) | 1998-05-15 | 1998-11-14 | 1999-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-15 | 2002-11-14 | 2003-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-15 | 2006-11-14 | 2007-05-16 | $7700.00 | Window Closed / Lapsed |