US5120578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating composition
Assignee: Shipley Co Inc
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Filing: 1991-07-29
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Granted: 1992-06-09
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Expires: 2011-07-29
Abstract
Abstract The invention discloses a new electroless plating catalyst and a process of using the same for selective plating. The catalyst and process are especially adapted for formation of EMI shielding for electronic components. The electroless plating catalyst comprises particulates dispersed in a liquid film forming composition which particulates are coated with a hydrous oxide that is reduced to a catalytic metal in contact with an electroless plating solution.
Inventors
- 👤 Jensheng Chen
- 👤 Philip D. Knudsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:24
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28; C23C18/30; H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/38; H05K3/386; H05K3/387
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
90 words
A process for electroless deposition of metal on a substrate comprising coating the substrate with a composition comprising a polymer solution having particles homogeneously dispersed therein, said particles comprising an inert particulate carrier coated with a hydrous oxide of a metal insoluble in the polymer solution that is catalytic to electroless metal deposition when in a reduced form, said hydrous oxide having a metal content of from 0.5 to 50 grams per liter of coating composition, drying the coating and contacting said treated substrate with an electroless metal plating solution.
Claim 2
Dependent Claim
90 words
A process for electroless deposition of metal on a substrate comprising coating the substrate with a composition comprising a polymer solution having particles homogeneously dispersed therein, said particles comprising an inert particulate carrier coated with a hydrous oxide of a metal insoluble in the polymer solution that is catalytic to electroless metal deposition when in a reduced form, said hydrous oxide having a metal content of from 0.5 to 50 grams per liter of coating composition, drying the coating and contacting said treated substrate with an electroless metal plating solution.
Claim 3
Dependent Claim
27 words
The process of claim 1 including a step of baking the substrate following application of the catalyst to remove solvent and bond the catalyst to the substrate.
Claim 4
Dependent Claim
23 words
The process of claim 1 where the solvent used in the liquid film forming coating composition is a solvent that solvates the substrate.
Claim 5
Dependent Claim
14 words
The process of claim 3 where said substrate is a housing for electronic equipment.
Claim 6
Dependent Claim
34 words
The process of claim 3 where a portion of the substrate is masked before coating with the electroless plating catalyst and the mask is removed prior to electroless metal deposition to achieve selective plating.
Claim 7
Dependent Claim
13 words
The process of claim 3 where the substrate is of an ABS resin.
Claim 8
Dependent Claim
13 words
The process of claim 3 where the substrate is of a polycarbonate resin.
Claim 9
Dependent Claim
129 words
An article of manufacture comprising a housing for an electronic component and a metal coating over at least a portion thereof in a thickness adequate to inhibit emission of electromagnetic wave energy, said metal coating being bonded to said housing through an intermediate layer, said intermediate layer being the product formed by applying a coating composition to said housing comprising a polymer solution having particles homogeneously dispersed therein, said particles comprising an inert particulate carrier coated with a hydrous oxide of a metal insoluble in the polymer solution that is catalytic to electroless metal deposition when in a reduced form, said hydrous oxide having a metal content of from 0.5 to 50 grams per liter of coating composition, drying the coating composition and reducing the hydrous oxide to metal.
Claim 10
Dependent Claim
129 words
An article of manufacture comprising a housing for an electronic component and a metal coating over at least a portion thereof in a thickness adequate to inhibit emission of electromagnetic wave energy, said metal coating being bonded to said housing through an intermediate layer, said intermediate layer being the product formed by applying a coating composition to said housing comprising a polymer solution having particles homogeneously dispersed therein, said particles comprising an inert particulate carrier coated with a hydrous oxide of a metal insoluble in the polymer solution that is catalytic to electroless metal deposition when in a reduced form, said hydrous oxide having a metal content of from 0.5 to 50 grams per liter of coating composition, drying the coating composition and reducing the hydrous oxide to metal.
Claim 11
Dependent Claim
11 words
The process of claim 8 where the housing is of polycarbonate.
References Cited (Backward Citations)
CA676894A
Cited
US3011920A
Cited
US3445350A
Cited
US3471313A
Cited
US3560257A
Cited
US4113658A
Cited
US3765936A
Cited
US3754070A
Cited
US3661597A
Cited
US3728137A
Cited
US3940533A
Cited
US3958066A
Cited
US4981725A
Cited
SU512204A1
Cited
US4253875A
Cited
US4126582A
Cited
US4447492A
Cited
US4752415A
Cited
US4863758A
Cited
US4514486A
Cited
US4511494A
Cited
US4556507A
Cited
US4670306A
Cited
US4696764A
Cited
US4820553A
Cited
US4663240A
Cited
GB2169925A
Cited
US4639380A
Cited
US4774270A
Cited
US4868008A
Cited
US4783243A
Cited
US4775557A
Cited
US4895739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-09 | 1995-12-09 | 1996-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-09 | 1999-12-09 | 2000-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-09 | 2003-12-09 | 2004-06-09 | $7700.00 | Window Closed / Lapsed |