Patent US6301891B2 successfully refreshed from Google Patents.
US4585901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
EMI/RFI vapor deposited composite shielding panel
Assignee: Messer LLC
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Filing: 1984-11-23
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Granted: 1986-04-29
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Expires: 2004-11-23
Abstract
Abstract An EMI/RFI shielding panel prepared by glow discharge treatment of a substrate material to provide a chemically reactive surface, and then successively vapor plating the surface with an adhesive layer of chromium or stainless steel, a shielding layer of copper or aluminum onto the adhesive layer, and then a protective layer of chromium or aluminum onto the shielding layer.
Inventors
- 👤 Walter J. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:08
CPC Classifications
H; H05; H05K; H05K9/00; C; C23; C23C; C23C14/00; C23C14/02; C23C14/021; C23C14/022; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12597
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
150 words
A panel for shielding the passage of electromagnetic radio frequency radiation interference therethrough, comprising an electrically insulating substrate sheet material having a surface with a composite shielding coating thereon, said coating comprising: (a) an adhesive layer of chromium or stainless steel bound to said surface by chemical bonds between molecules within said adhesive layer and molecules within said substrate sheet material, said layer having a thickness within the range of about 300 Angstroms to about 1000 Angstroms; (b) an aluminum or copper shielding layer deposited onto the exterior of said adhesive coating having a thickness of from about 1,000 Angstroms to about 50,000 Angstroms; and (c) an outermost chromium or stainless steel protective layer deposited onto the exterior of said shielding coating, said protective layer having a thickness of at least about 1,000 Angstroms to provide abrasion resistance and to prevent oxidation of the copper or aluminum shielding layer (b).
Claim 2
Dependent Claim
150 words
A panel for shielding the passage of electromagnetic radio frequency radiation interference therethrough, comprising an electrically insulating substrate sheet material having a surface with a composite shielding coating thereon, said coating comprising: (a) an adhesive layer of chromium or stainless steel bound to said surface by chemical bonds between molecules within said adhesive layer and molecules within said substrate sheet material, said layer having a thickness within the range of about 300 Angstroms to about 1000 Angstroms; (b) an aluminum or copper shielding layer deposited onto the exterior of said adhesive coating having a thickness of from about 1,000 Angstroms to about 50,000 Angstroms; and (c) an outermost chromium or stainless steel protective layer deposited onto the exterior of said shielding coating, said protective layer having a thickness of at least about 1,000 Angstroms to provide abrasion resistance and to prevent oxidation of the copper or aluminum shielding layer (b).
Claim 3
Dependent Claim
16 words
The panel as in claim 1 wherein said adhesive layer in (a) is comprised of chromium.
Claim 4
Dependent Claim
18 words
The panel as in claims 1 or 2 wherein said shielding layer in (b) is comprised of copper.
Claim 5
Dependent Claim
16 words
The panel as in claims 1 or 2 wherein said protective layer is comprised of chromium.
Claim 6
Dependent Claim
26 words
The panel as in claims 1 or 2 wherein said adhesive layer in (a) has a thickness within the range of about 300 to 500 Angstroms.
Claim 7
Dependent Claim
26 words
The panel as in claims 1 or 2 wherein said shielding layer in (b) has a thickness within the range of about 2,000 to 10,000 Angstroms.
Claim 8
Dependent Claim
26 words
The panel as in claims 1 or 2 wherein said protective layer in (c) has a thickness within the range of about 2,000 to 5,000 Angstroms.
Claim 9
Dependent Claim
28 words
The panel as defined in claims 1 or 2 wherein said substrate sheet material has a thickness within the range of about 0.06 inch to about 0.3 inch.
Claim 10
Dependent Claim
32 words
The panel as in claims 1 or 2 wherein said substrate sheet material is a plastic selected from the group of materials consisting of polyphenylene, polyimides, polyacrylonitrile-butadiene-styrene (ABS), polyester, polyamide, and polycarbonate.
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) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |