US4478883A
Expired / Lapsed
US
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Conditioning of a substrate for electroless direct bond plating in holes and on surfaces of a substrate
Assignee: JEPMAR RESEARCH
•
Filing: 1982-07-14
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Granted: 1984-10-23
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Expires: 2002-07-14
Abstract
Abstract A dielectric surface is conditioned for electroless plating of a conductive metal thereon by contacting the surface with a multifunctional ionic copolymer. The conditioning can be in the holes and/or on the surfaces of the substrate.
Inventors
- 👤 James R. Bupp
- 👤 Voya Markovich
- 👤 Tracy E. Napp
- 👤 Carlos J. Sambucetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:30
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/38; H05K3/381; C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/1851; C23C18/1855; C23C18/1858; C23C18/1862; C23C18/1865; C23C18/1872; C23C18/1886; C23C18/1893
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
117 words
A method for conditioning at least one surface of a dielectric substrate material for the electroless plating of a conductive metal thereon, which comprises: contacting said at least one surface with a composition containing a multifunctional ionic polymer material containing at least two available ionic moieties, wherein said ionic moieties are of a charge opposite from the charge associated with the colloidal catalyst particles to be subsequently applied to the substrate to provide for electrostatic attraction of said colloidal catalyst particles, and then activating the surface by contacting it with a composition containing a colloidal catalyst to provide directly or as a precursor leading to catalytic sites capable of electroless plating initiation of a conductive metal thereon.
Claim 2
Independent Claim
117 words
A method for conditioning at least one surface of a dielectric substrate material for the electroless plating of a conductive metal thereon, which comprises: contacting said at least one surface with a composition containing a multifunctional ionic polymer material containing at least two available ionic moieties, wherein said ionic moieties are of a charge opposite from the charge associated with the colloidal catalyst particles to be subsequently applied to the substrate to provide for electrostatic attraction of said colloidal catalyst particles, and then activating the surface by contacting it with a composition containing a colloidal catalyst to provide directly or as a precursor leading to catalytic sites capable of electroless plating initiation of a conductive metal thereon.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein said multifunctional ionic polymer material is a multifunctional cationic polymer material.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein said multifunctional ionic polymer material is a copolymer of acrylamide and ammonium quaternary compounds.
Claim 5
Dependent Claim
20 words
The method of claim 3 wherein said composition contains about 0.01 to about 1% by weight of said copolymeric material.
Claim 6
Dependent Claim
21 words
The method of claim 3 wherein said composition contains about 0.05 to about 0.5% by weight of said ionic copolymeric material.
Claim 7
Dependent Claim
11 words
The method of claim 3 wherein said composition also contains HCl.
Claim 8
Dependent Claim
21 words
The method of claim 3 wherein said HCl is present in an amount of about 2 to about 10% by weight.
Claim 9
Dependent Claim
24 words
The method of claim 1 wherein said contacting with said composition containing a multifunctional ionic polymer is for about 1 to about 10 minutes.
Claim 10
Dependent Claim
20 words
The method of claim 1 wherein said contacting with said multifunctional ionic polymer is about 1 to about 5 minutes.
Claim 11
Dependent Claim
17 words
The method of claim 1 wherein the surface is activated with a composition containing a palladium compound.
Claim 12
Dependent Claim
16 words
The method of claim 1 wherein said surface is activated with a composition containing palladium chloride.
Claim 13
Dependent Claim
43 words
The method of claim 11 wherein said palladium chloride composition contains about 1.2 to about 2.5 grams per liter of palladium chloride, about 80 to about 150 grams of stannous chloride, and about 100 to about 150 milliliters per liter of 37% HCl.
Claim 14
Dependent Claim
41 words
The method of claim 1 wherein the activating is with a composition containing about 1.5 grams per liter of PdCl 2 , about 100 grams per liter of SnCl 2 , and about 280 milliliters per liter of 35% aqueous HCl.
Claim 15
Dependent Claim
20 words
The method of claim 13 wherein the contacting is at a temperature of about 65± 10° F. for the activating.
Claim 16
Dependent Claim
22 words
The method of claim 1 which additionally includes contacting the activated surface with an electroless plating bath containing a conductive metal therein.
Claim 17
Dependent Claim
13 words
The method of claim 15 wherein said conductive metal is nickel or copper.
Claim 18
Dependent Claim
11 words
The method of claim 15 wherein said conductive metal is copper.
Claim 19
Dependent Claim
17 words
The method of claim 1 wherein said at least one surface includes through holes in a substrate.
Claim 20
Dependent Claim
18 words
The method of claim 1 wherein said at least one surface includes a major surface on a substrate.
Claim 21
Dependent Claim
14 words
The method of claim 3 wherein said composition has a pH of about 1-7.
Claim 22
Dependent Claim
14 words
The method of claim 7 wherein said composition has a pH of about 2-3.
Claim 23
Dependent Claim
24 words
The method of claim 1 wherein said contacting with said composition containing a multifunctional ionic polymer is for about 1 to about 2 minutes.
Claim 24
Dependent Claim
21 words
The method of claim 1 wherein said multifunctional ionic polymer material is a polyacrylamide backbone having attached thereto tetraalkyl ammonium compounds.
Claim 25
Dependent Claim
19 words
The method of claim 1 wherein said polymer material is a copolymer of acrylamide and hexamethacryloxyethyltrimethyl ammonium methyl sulfate.
Claim 26
Dependent Claim
22 words
The method of claim 1 wherein said polymer material provides for the electrostatic attraction of said catalyst particles to said dielectric substrate.
Claim 27
Dependent Claim
12 words
The method of claim 1 wherein said polymer material is water soluble.
Claim 28
Dependent Claim
17 words
The method of claim 1 wherein said ionic moieties are quaternary phosphonium groups or quaternary ammonium groups.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |