US5238554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making patterns
Assignee: BASF Corp
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Filing: 1992-06-22
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Granted: 1993-08-24
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Expires: 2012-06-22
Abstract
Abstract A method of making a metallic pattern on a substrate having a surface comprising bare metal in predetermined areas and metal coated with a resist in remaining areas which comprises (i) protecting the bare metal by electrodepositing thereon a heat-curable polymeric film having (a) a group which is reactive with an isocyanate group and (b) a blocked isocyanate group, and incorporating in the electrodeposited film a compound containing at least two groups selected from hydroxy, amino and carboxyl, (ii) heating the electrodeposited film to render it resistant to a solvent with which the resist is removable (iii) removing the resist from said remaining areas using a solvent which does not remove the electrodeposited polymeric film, thereby exposing metal in said remaining areas, and (iv) etching the metal exposed in step (iii) using an etchant which does not remove the electrodeposited polymeric film, thereby leaving a metallic pattern protected by the electrodeposited polymeric film.
Inventors
- 👤 Christopher P. Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:15
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/02; H05K3/06; H05K3/061; C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/4465; G; G03; G03F; G03F7/00; G03F7/26; G03F7/40; H05K2203/00; H05K2203/05; H05K2203/0562; H05K2203/0582; H05K2203/11; H05K2203/1105; H05K2203/13; H05K2203/1333; H05K2203/135; H05K3/0073; H05K3/0076
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
153 words
A method of making a metallic pattern on a substrate having a surface comprising bare metal in predetermined areas and metal coated with a resist in remaining areas which comprises (i) protecting the bare metal by electrodepositing thereon a heat-curable polymeric film having (a) a group which is reactive with an isocyanate group and (b) a blocked isocyanate group, and incorporating in the electrodeposited film a compound containing at least two groups selected from hydroxy, amino and carboxyl, (ii) heating the electrodeposited film to render it resistant to a solvent with which the resist is removable (iii) removing the resist from said remaining areas using a solvent which does not remove the electrodeposited polymeric film, thereby exposing metal in said remaining areas, and (iv) etching the metal exposed in step (iii) using an etchant which does not remove the electrodeposited polymeric film, thereby leaving a metallic pattern protected by the electrodeposited polymeric film.
Claim 2
Independent Claim
153 words
A method of making a metallic pattern on a substrate having a surface comprising bare metal in predetermined areas and metal coated with a resist in remaining areas which comprises (i) protecting the bare metal by electrodepositing thereon a heat-curable polymeric film having (a) a group which is reactive with an isocyanate group and (b) a blocked isocyanate group, and incorporating in the electrodeposited film a compound containing at least two groups selected from hydroxy, amino and carboxyl, (ii) heating the electrodeposited film to render it resistant to a solvent with which the resist is removable (iii) removing the resist from said remaining areas using a solvent which does not remove the electrodeposited polymeric film, thereby exposing metal in said remaining areas, and (iv) etching the metal exposed in step (iii) using an etchant which does not remove the electrodeposited polymeric film, thereby leaving a metallic pattern protected by the electrodeposited polymeric film.
Claim 3
Dependent Claim
37 words
A method as claimed in claim 1 in which the compound incorporated in the electrodeposited polymeric film is a glycol, a polyol, a polyamine, an amino alcohol, a hydroxy acid, an amino acid or a polycarboxylic acid.
Claim 4
Dependent Claim
22 words
A method as claimed in claim 2 in which the compound incorporated in the electrodeposited polymeric film is itself a polymeric compound.
Claim 5
Dependent Claim
16 words
A method as claimed in claim 3 in which the polymeric compound is a polyalkylene glycol.
Claim 6
Dependent Claim
40 words
A method as claimed in claim 1 in which the compound is incorporated into the polymeric film by adding it to the electrodeposition bath, before the resin is deposited, in amounts of up to 10% of the total bath weight.
Claim 7
Dependent Claim
37 words
A method as claimed in claim 1 in which the compound is incorporated in the electrodeposited film by dipping the film in an aqueous solution of said compound at a concentration of up to 50% by weight.
Claim 8
Dependent Claim
24 words
A method as claimed in claim 6 in which the film is dipped in said solution for a time of up to 15 minutes.
Claim 9
Dependent Claim
32 words
A method as claimed in claim 1 in which, in the electrodeposited heat-curable film, the group reactive with an isocyanate group is a hydroxyl, mercapto, primary or secondary amino, or carboxyl group.
Claim 10
Dependent Claim
42 words
A method as claimed in claim 1 in which the heat-curable film is formed by electrodepositing an electrodepositable resin containing a group reactive with an isocyanate group, and a salt forming group in admixture with a compound containing a blocked isocyanate group.
Claim 11
Dependent Claim
35 words
A method as claimed in claim 1 in which the heat-curable film is formed by electrodepositing an electrodepositable resin containing a group reactive with an isocyanate group, a salt-forming group and a blocked isocyanate group.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-23 | 1997-02-22 | 1997-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-23 | 2001-02-22 | 2001-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-23 | 2005-02-22 | 2005-08-24 | $7700.00 | Window Closed / Lapsed |