Patent US4917761A successfully refreshed from Google Patents.
US4917761A
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Method of rendering polymeric materials hydrophilic for etching
Assignee: Eastman Chemical Co
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Filing: 1989-08-14
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Granted: 1990-04-17
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Expires: 2009-08-14
Abstract
Abstract Disclosed is a method of rendering polymeric materials hydrophilic by treating the material sequentially with different solvents. The method is especially useful in the preparation of polymeric substrates for etching.
Inventors
- 👤 Gerald T. Keep
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:36
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/02; H; H05; H05K; H05K3/00; H05K3/38; H05K3/381; H05K2203/00; H05K2203/07; H05K2203/0779; H05K2203/0783; H05K3/10; H05K3/18; H05K3/181
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
45 words
The method of rendering a polymeric material hydrophilic before etching comprising the steps of contacting said material with a primary solvent to swell the material, and then contacting the material with a secondary solvent which has substantial solubility in both the primary solvent and water.
Claim 2
Independent Claim
45 words
The method of rendering a polymeric material hydrophilic before etching comprising the steps of contacting said material with a primary solvent to swell the material, and then contacting the material with a secondary solvent which has substantial solubility in both the primary solvent and water.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein said primary solvent is selected from the group consisting of ethylacetate, butylacetate, cyclohexanone, dichlorobenzane, dioctyl phthalate, and benzaldehyde.
Claim 4
Dependent Claim
26 words
The method of claim 1 wherein said secondary solvent is selected from the group consisting of acetone, alcohols having 1 to 8 carbon atoms and γ-butyrolactone.
Claim 5
Independent Claim
72 words
The method of selectively metallizing a polymeric substrate comprising the steps of (a) contacting said polymeric substrate with a primary organic solvent for a length of time of about 1-5 minutes to swell said substrate, (b) contacting said substrate with a secondary solvent which is miscible with both the primary solvent and water; (c) etching the substrate; and (d) subjecting the substrate to electroless metal plating to obtain the selectively metallized substrate.
Claim 6
Independent Claim
72 words
The method of selectively metallizing a polymeric substrate comprising the steps of (a) contacting said polymeric substrate with a primary organic solvent for a length of time of about 1-5 minutes to swell said substrate, (b) contacting said substrate with a secondary solvent which is miscible with both the primary solvent and water; (c) etching the substrate; and (d) subjecting the substrate to electroless metal plating to obtain the selectively metallized substrate.
Claim 7
Dependent Claim
24 words
The method of claim 4 wherein said primary solvent is selected from the group consisting of ethylacetate, butylacetate, cyclohexanone, dichlorobenzane, dioctyl phthalate, and benzaldehyde.
Claim 8
Dependent Claim
24 words
The method of claim 4 wherein said secondary solvent is selected from the group consisting of acetone, alcohols having 1.8 carbon atoms and γ-butyrolacetone.
Claim 9
Dependent Claim
46 words
The method of claim 4 wherein said primary solvent is selected from the group consisting of ethylacetate, butylacetate, cyclohexanone, dichloro benzane, dioctyl phthalate, and benzaldehyde, and said secondary solvent is selected from the group consisting of acetone, alcohols having 1 to 8 carbon atoms, and γ-butyrolacetone.
Claim 10
Dependent Claim
23 words
The method of claim 1 wherein said primary solvent is selected from the group consisting of esters and aldehydes containing 1-25 carbon atoms.
Claim 11
Dependent Claim
23 words
The method of claim 4 wherein said primary solvent is selected from the group consisting of esters and aldehydes containing 1-25 carbon atoms.
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) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |