US4428987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving copper-epoxy adhesion
Assignee: Shell Development Co
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Filing: 1982-04-28
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Granted: 1984-01-31
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Expires: 2002-04-28
Abstract
Abstract The present invention is directed to a method for improving the adhesion of epoxy resins to copper substrates which comprises pretreating the copper substrate with a solution of a suitable pretreatment compound such as a benzotriazole, benzothiazole, substituted benzotriazoles, etc.
Inventors
- 👤 James P. Bell
- 👤 Jae M. Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:33
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D3/00; B05D3/10; B05D3/102; H; H05; H05K; H05K3/00; H05K3/38; H05K3/389; B05D1/00; B05D1/007; B05D2202/00; B05D2202/40; B05D2202/45; B05D2504/00; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
129 words
A process for improving the adhesion of epoxy resins to a copper substrate which comprises (1) subjecting the substrate to cathodic polarization of from about 1 to about 15 volts for from about one second to about 15 minutes in an electrolytic bath and then immersing the polarized substrate in a 0.001 to 0.1 molar solution of at least one compound of the general formula: ##STR8## wherein A is a --N═ or --S--, B is a --N═ or --C═, Y is a --N═ or NH═, D is H, --SH, --SR, ##STR9## or R wherein R is an alkyl or aryl radical, and m is an integer from 0 to 10, and X is H, --NH 2 , ##STR10## or --OH for from about 1 second to about one hour.
Claim 2
Dependent Claim
129 words
A process for improving the adhesion of epoxy resins to a copper substrate which comprises (1) subjecting the substrate to cathodic polarization of from about 1 to about 15 volts for from about one second to about 15 minutes in an electrolytic bath and then immersing the polarized substrate in a 0.001 to 0.1 molar solution of at least one compound of the general formula: ##STR8## wherein A is a --N═ or --S--, B is a --N═ or --C═, Y is a --N═ or NH═, D is H, --SH, --SR, ##STR9## or R wherein R is an alkyl or aryl radical, and m is an integer from 0 to 10, and X is H, --NH 2 , ##STR10## or --OH for from about 1 second to about one hour.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein the compound is a benzothiozole of the general formula: ##STR11## wherein X and D are defined as in claim 1.
Claim 4
Dependent Claim
9 words
The process of claim 2 wherein X is hydrogen.
Claim 5
Dependent Claim
11 words
The process of claim 2 wherein X is --NH 2 .
Claim 6
Dependent Claim
10 words
The process of claim 2 wherein X is an --OH.
Claim 7
Dependent Claim
10 words
The process of claim 2 wherein X is a ##STR12##
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein the solvent is a polar solvent.
Claim 9
Dependent Claim
12 words
The process of claim 7 wherein the polar solvent is a ketone.
Claim 10
Dependent Claim
10 words
The process of claim 1 wherein the compound is 5-aminobenzotriazole.
References Cited (Backward Citations)
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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) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |