US5047260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a shielded plastic enclosure to house electronic equipment
Assignee: Poly Flex Circuits Inc
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Filing: 1990-01-03
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Granted: 1991-09-10
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Expires: 2010-01-03
Abstract
Abstract A method for fabricating a shielded plastic enclosure for housing electronic equipment involves applying to at least one interior surface of the enclosure a layer of shielding composition which is a suspension of silver-coated magnetite particles in a U.V. curable resin. The thickness of this layer of shielding material is such that it effectively shields against electromagnetic interference, radio frequency interference and electrostatic discharge. Thereafter the shielding material is cured by exposure to a U.V. source.
Inventors
- 👤 David Durand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:40
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/12; H05K3/1283; C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/101; C09D11/52; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H01F; H01F41/00; H01F41/14; H01F41/16; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; H05K3/22; H05K3/24; H05K3/245; H05K2201/00; H05K2201/08; H05K2201/083; H05K2203/00; H05K2203/10; H05K2203/104; H10; H10W; H10W72/00; H10W72/071; H10W72/073
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A method of fabricating a shielded plastic enclosure for housing electronic equipment, comprising the steps of: applying a layer to at least one interior surface of said enclosure of a shielding composition comprising a suspension of silver-coated magnetite particles in a U.V. curable resin, said shielding composition being applied in an amount sufficient such that the resulting layer of said shielding composition has a thickness to effectively shield against electromagnetic interference, radio frequency interference or electrostatic discharge; and effecting U.V. radiation cure of the said U.V. curable resin by exposing said shielding composition to a U.V. source having an output in the region between 360 nm and 420 nm for a time sufficient to cure said U.V. curable resin.
Claim 2
Independent Claim
119 words
A method of fabricating a shielded plastic enclosure for housing electronic equipment, comprising the steps of: applying a layer to at least one interior surface of said enclosure of a shielding composition comprising a suspension of silver-coated magnetite particles in a U.V. curable resin, said shielding composition being applied in an amount sufficient such that the resulting layer of said shielding composition has a thickness to effectively shield against electromagnetic interference, radio frequency interference or electrostatic discharge; and effecting U.V. radiation cure of the said U.V. curable resin by exposing said shielding composition to a U.V. source having an output in the region between 360 nm and 420 nm for a time sufficient to cure said U.V. curable resin.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein said shielding composition comprises a mixture of a cycloaliphatic epoxy resin and a cationic photoinitiator.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein said shielding composition also contains a plasticizer.
Claim 5
Dependent Claim
28 words
The method of claim 1 wherein said shielding composition contains by volume 25 to 67 percent silver-coated magnetite spheres based on the total volume of said shielding composition.
Claim 6
Dependent Claim
11 words
The method of claim 3 wherein said plasticizer is polyether polyol.
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) | 1994-09-09 | 1995-03-11 | 1995-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-09 | 1999-03-11 | 1999-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-09 | 2003-03-11 | 2003-09-10 | $7700.00 | Window Closed / Lapsed |