EP0259785A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Self-shielding multi-layer circuit boards
Assignee: General Electric Co
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Filing: 1987-09-03
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Granted: —
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Expires: 2007-09-03
Abstract
Abstract Self-shielding multi-layer circuit boards are produced utilizing augmentative replacement techniques.
Inventors
- 👤 Thomas Patrick Wacker
- 👤 Charles William Eichelberger
- 👤 Robert John Wojnarowski
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 19:29
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/002; H05K9/0039; H05K1/00; H05K1/02; H05K1/0213; H05K1/0216; H05K1/0218; H05K2201/00; H05K2201/07; H05K2201/0707; H05K2201/0715; H05K2203/00; H05K2203/07; H05K2203/0703; H05K2203/073; H05K3/00; H05K3/46; H05K3/4644; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12035; Y10T428/12049; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
90 words
A multi-layer circuit board comprising (a) a two-sided base; (b) at least one combination of circuit conductive pattern with insulating dielectric layer adhered thereto designed on at least one side of said base; and (c) uniform voltage conductive patterns designed as an outermost conductive pattern on both sides of said two-sided base, wherein said uniform voltage conductive patterns cover a sufficient surface area of all underlying circuit conductive patterns to provide a shielding effect and at least one of said uniform voltage conductive patterns is designed by augmentative replacement techniques.
Claim 2
Dependent Claim
90 words
A multi-layer circuit board comprising (a) a two-sided base; (b) at least one combination of circuit conductive pattern with insulating dielectric layer adhered thereto designed on at least one side of said base; and (c) uniform voltage conductive patterns designed as an outermost conductive pattern on both sides of said two-sided base, wherein said uniform voltage conductive patterns cover a sufficient surface area of all underlying circuit conductive patterns to provide a shielding effect and at least one of said uniform voltage conductive patterns is designed by augmentative replacement techniques.
Claim 3
Dependent Claim
20 words
The circuit board of claim 1 wherein at least one said circuit conductive pattern is designed by resist imaging techniques.
Claim 4
Dependent Claim
19 words
The circuit board of claim 1 wherein at least one said circuit conductive pattern is designed by augmentative replacement.
Claim 5
Dependent Claim
24 words
The circuit board of claim 1 wherein said circuit conductive pattern and said dielectric layer are applied to both sides of said two-sided base.
Claim 6
Dependent Claim
19 words
The circuit board of claim 1 wherein the thickness of said two-sided base is less than about 1/4 inch.
Claim 7
Dependent Claim
21 words
The circuit board of claim 1 wherein said dielectric layers have a thickness ranging from about 1 to about 4 mils.
Claim 8
Dependent Claim
35 words
The circuit board of claim 1 wherein said uniform voltage conductive patterns cover at least about 50% of the surface area of all said underlying circuit conductive patterns from either side of said two-sided base.
Claim 9
Dependent Claim
46 words
The circuit board of claim 1 wherein said uniform voltage conductive patterns cover a sufficient surface area of said underlying circuit traces to reduce the power of noise emission by said underlying circuit traces by 1/2 in either direction from the surface of said two-sided base.
Claim 10
Dependent Claim
28 words
The circuit board of claim 1 wherein said uniform conductive pattern is closer to the conductors of said circuit conductive pattern than said conductors are to one another.
Claim 11
Dependent Claim
12 words
The circuit board of claim 1 wherein said dielectric layer is photo-imaged.
Claim 12
Dependent Claim
13 words
The circuit board of claim 1 wherein said dielectric layer is screen printed.
Claim 13
Dependent Claim
18 words
The circuit board of claim 1 wherein said uniform voltage conductive pattern is a power supply or ground.
Claim 14
Dependent Claim
85 words
A multi-layer circuit board comprising: (a) a two-sided base, (b) a combination of circuit conductive pattern with insulating dielectric layer adhered thereto designed on both sides of said base; and (c) uniform voltage conductive patterns designed as an outermost conductive pattern on both sides of said base, wherein said uniform voltage conductive patterns cover a sufficient surface area of all underlying circuit conductive patterns to provide a decoupling or shielding effect and both of said uniform voltage conductive patterns are designed by augmentative replacement techniques.
Claim 15
Dependent Claim
85 words
A multi-layer circuit board comprising: (a) a two-sided base, (b) a combination of circuit conductive pattern with insulating dielectric layer adhered thereto designed on both sides of said base; and (c) uniform voltage conductive patterns designed as an outermost conductive pattern on both sides of said base, wherein said uniform voltage conductive patterns cover a sufficient surface area of all underlying circuit conductive patterns to provide a decoupling or shielding effect and both of said uniform voltage conductive patterns are designed by augmentative replacement techniques.
Claim 16
Dependent Claim
42 words
A multi-layer circuit board comprising: (a) a uniform voltage conductive pattern designed by augmentative replacement as an outermost conductive pattern, wherein said uniform voltage conductive pattern covers a sufficient area of underlying circuit conductive patterns to provide a decoupling or shielding effect.
Claim 17
Dependent Claim
42 words
A multi-layer circuit board comprising: (a) a uniform voltage conductive pattern designed by augmentative replacement as an outermost conductive pattern, wherein said uniform voltage conductive pattern covers a sufficient area of underlying circuit conductive patterns to provide a decoupling or shielding effect.
References Cited (Backward Citations)
No citation records indexed.
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