US4309462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conditioning of caprolactam polymers for electroless plating
Assignee: Crown City Plating Co
•
Filing: 1980-06-16
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Granted: 1982-01-05
•
Expires: 2000-06-16
Abstract
Abstract Caprolactam polymeric substrates are conditioned for electroless plating by etching with an aqueous solution of organic acid containing from 2 to 4 carbon atoms, preferably an acetic acid compound, such as trichloroacetic acid.
Inventors
- 👤 David A. Dillard
- 👤 Eileen Maguire
- 👤 Lawrence P. Donovan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:40
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/14; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/22; C23C18/24; C08J2377/00; C08J2377/02; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/38; H05K3/381
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
92 words
A process for etching the surface of a caprolactam polymer substrate for electroless plating which comprises etching the caprolactam substrate with an aqueous organic acid etch solution comprising at least one organic acid compound containing 2 to 4 carbon atoms in the molecule and soluble in a concentration of at least about 3 percent by weight of solution and present in a concentration sufficient to render the caprolactam substrate uniformly and directly receptive to a metal electroless plating catalyst and depositing a metal electroless plating catalyst on the etched caprolactam polymer substrate.
Claim 2
Dependent Claim
92 words
A process for etching the surface of a caprolactam polymer substrate for electroless plating which comprises etching the caprolactam substrate with an aqueous organic acid etch solution comprising at least one organic acid compound containing 2 to 4 carbon atoms in the molecule and soluble in a concentration of at least about 3 percent by weight of solution and present in a concentration sufficient to render the caprolactam substrate uniformly and directly receptive to a metal electroless plating catalyst and depositing a metal electroless plating catalyst on the etched caprolactam polymer substrate.
Claim 3
Dependent Claim
48 words
A process as claimed in claim 1 in which the caprolactam polymer substrate is contacted, prior to contact with the aqueous organic acid etch solution, with a dilute aqueous solution of an organic solvent for caprolactam for a time sufficient to soften the surface of the caprolactam substrate.
Claim 4
Dependent Claim
95 words
A process for etching the surface of a caprolactam polymer substrate for electroless plating which comprises contacting the caprolactam polymer substrate with an aqueous organic acid etching solution comprising at least one acetic acid compound having the formula: ##STR3## wherein each X is independently selected from the group consisting of hydrogen, hydroxyl and halogen and in which the acetic acid compound is present in a concentration sufficient to render the caprolactam substrate uniormly and directly receptive to a metal electroless plating catalyst and depositing a metal electroless plating catalyst on the etched caprolactam polymer substrate.
Claim 5
Dependent Claim
95 words
A process for etching the surface of a caprolactam polymer substrate for electroless plating which comprises contacting the caprolactam polymer substrate with an aqueous organic acid etching solution comprising at least one acetic acid compound having the formula: ##STR3## wherein each X is independently selected from the group consisting of hydrogen, hydroxyl and halogen and in which the acetic acid compound is present in a concentration sufficient to render the caprolactam substrate uniormly and directly receptive to a metal electroless plating catalyst and depositing a metal electroless plating catalyst on the etched caprolactam polymer substrate.
Claim 6
Dependent Claim
20 words
A process as claimed in claim 3, in which the caprolactam polymer substrate is formed of a filled caprolactam polymer.
Claim 7
Dependent Claim
32 words
A process as claimed in claim 3, in which the total acetic acid compound concentration of the conditioning solution is from about 3 percent by weight of the solution to solution saturation.
Claim 8
Dependent Claim
32 words
A process as claimed in claim 3, in which the total acetic acid compound concentration of the conditioning solution is from about 5 to about 60 percent by weight of the solution.
Claim 9
Dependent Claim
31 words
A process as claimed in claim 3, in which the caprolactam polymer substrate is contacted with the conditioning solution for a period of from about 10 seconds to about 15 minutes.
Claim 10
Dependent Claim
15 words
A process as claimed in claim 3, in which the acetic compound is trichloroacetic acid.
Claim 11
Dependent Claim
48 words
A process as claimed in claim 3, in which the caprolactam polymer substrate is contacted, prior to contact with the aqueous etch solution, with a dilute aqueous solution of an organic solvent for caprolactam polymer for a time sufficient to soften the surface of the caprolactam polymer substrate.
Claim 12
Dependent Claim
90 words
A process for etching the surface of caprolactam polymer substrates for electroless plating which comprises contacting the caprolactam polymer substrate with an aqueous organic acid etch solution of trichloroacetic acid in which the trichloroacetic acid is present in a concentration of from about 5 percent by weight to solution saturation for a time of from about 10 seconds to 15 minutes to render the caprolactam polymer substrate uniformly and directly receptive to a metal electroless plating catalyst and depositing a metal electroless plating catalyst on the etched caprolactam polymer substrate.
Claim 13
Dependent Claim
90 words
A process for etching the surface of caprolactam polymer substrates for electroless plating which comprises contacting the caprolactam polymer substrate with an aqueous organic acid etch solution of trichloroacetic acid in which the trichloroacetic acid is present in a concentration of from about 5 percent by weight to solution saturation for a time of from about 10 seconds to 15 minutes to render the caprolactam polymer substrate uniformly and directly receptive to a metal electroless plating catalyst and depositing a metal electroless plating catalyst on the etched caprolactam polymer substrate.
Claim 14
Dependent Claim
20 words
A process as claimed in claim 10, in which the caprolactam polymer substrate is formed of a filled caprolactam polymer.
Claim 15
Dependent Claim
29 words
A process as claimed in claim 10, in which the concentration of trichloroacetic acid in solution is from about 5 to about 60 percent by weight of the solution.
Claim 16
Dependent Claim
49 words
A process as claimed in claim 10 in which the caprolactam polymer substrate is contacted, prior to contact with the aqueous etch solution, with a dilute aqueous solution of an organic solvent for the caprolactam polymer for a time sufficient to soften the surface of the caprolactam polymer substrate.
References Cited (Backward Citations)
GB551820A
Cited
GB626380A
Cited
GB896606A
Cited
GB1015273A
Cited
US3574070A
Cited
GB1310306A
Cited
US3686017A
Cited
US4125649A
Cited
US4084023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |