US4548879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solderable polymer thick films
Assignee: National Starch and Chemical Investment Holding Corp
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Filing: 1984-05-21
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Granted: 1985-10-22
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Expires: 2004-05-21
Abstract
Abstract This invention discloses conductive compositions having improved solderability. These compositions contain metal and/or alloys thereof coated with saturated monocarboxylic acid which is dispersed in an organic polymeric matrix. Also disclosed is a method for preparing these conductive compositions. Another embodiment of the invention is a method of coating metal and/or alloys thereof with carboxylic acid.
Inventors
- 👤 Frank St. John
- 👤 Wayne Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:00
CPC Classifications
G; G03; G03F; G03F5/00; H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; C; C08; C08K; C08K9/00; C08K9/04; C09; C09D; C09D5/00; C09D5/24; H01; H01B; H01B1/00; H01B1/20; H01B1/22; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
22 words
A conductive composition having improved solderability comprising metal comprising nickel, coated with saturated monocarboxylic acid, and dispersed in an organic polymeric matrix.
Claim 2
Dependent Claim
22 words
A conductive composition having improved solderability comprising metal comprising nickel, coated with saturated monocarboxylic acid, and dispersed in an organic polymeric matrix.
Claim 3
Dependent Claim
13 words
The composition of claim 1 applied to a substrate to form a film.
Claim 4
Dependent Claim
10 words
The composition of claim 2 which is dried and cured.
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein the metal is in the form of powder, flake or sponge or mixtures thereof.
Claim 6
Dependent Claim
24 words
The composition of claim 1 wherein the organic polymeric matrix is selected from the group consisting of thermoset resins, epoxy resins, and phenolic resins.
Claim 7
Dependent Claim
41 words
The composition of claim 1 wherein the saturated monocarboxylic acid is defined by the formula: ##STR2## wherein R is a hydrocarbon group of the general formula C n H 2 n+1 wherein n is an integer from about 10 to 18.
Claim 8
Dependent Claim
14 words
The composition of claim 1 wherein the saturated monocarboxylic acid is a fatty acid.
Claim 9
Dependent Claim
22 words
The composition of claim 1 wherein the saturated monocarboxylic acid is selected from the group consisting of octadecanoic acid or n-heptadecanoic acid.
Claim 10
Dependent Claim
23 words
The composition of claim 1 wherein the ratio of metal to organic polymeric matrix is from about 5:3 to about 20:1, by weight.
Claim 11
Dependent Claim
23 words
The composition of claim 1 wherein the ratio of saturated monocarboxylic acid to metal is from about 1:1000 to about 1:30, by weight.
Claim 12
Dependent Claim
21 words
The composition of claim 1 wherein the metal is present in an amount of from about 50% to 85%, by weight.
Claim 13
Dependent Claim
23 words
The composition of claim 1 wherein the saturated monocarboxylic acid is present in an amount of from about 0.1 to 3% by weight.
Claim 14
Dependent Claim
27 words
A process for preparing readily solderable conductive compositions comprising coating metal comprising nickel with saturated monocarboxylic acid and thereafter dispersing the metal in an organic polymeric matrix.
Claim 15
Dependent Claim
27 words
A process for preparing readily solderable conductive compositions comprising coating metal comprising nickel with saturated monocarboxylic acid and thereafter dispersing the metal in an organic polymeric matrix.
Claim 16
Dependent Claim
24 words
The process of claim 13 wherein the organic polymeric matrix is selected from the group consisting of epoxy resins, themoset resins, and phenolic resins.
Claim 17
Dependent Claim
16 words
The process of claim 13 wherein the metal is powder, flake, or sponge or mixtures thereof.
Claim 18
Dependent Claim
42 words
The process of claim 13 wherein the saturated monocarboxylic acid is defined by the formula: ##STR3## wherein R is a hydrocarbon group of the general formula C n H 2 n+1 wherein n is an integer from about 10 to about 18.
Claim 19
Dependent Claim
14 words
The process of claim 13 wherein the saturated monocarboxylic acid is a fatty acid.
Claim 20
Dependent Claim
38 words
The process of claim 13 wherein the saturated monocarboxylic acid is selected from the group consisting of n-heptadeconoic acid, hexadecanoic acid, octadeconic acid, tetradeconic acid, n-pentadecanoic acid, decanoic acid, undecanoic acid, nonadecanoic acid, dodecanoic acid and n-tridecanoic acid.
Claim 21
Dependent Claim
23 words
The process of claim 13 wherein the ratio of metal to organic polymeric matrix is form about 50:50 to about 85:15, by weight.
Claim 22
Dependent Claim
22 words
The process of claim 13 wherein the ratio of carboxylic acid to metal is from about 1:1000 to about 1:30, by weight.
Claim 23
Dependent Claim
45 words
A process of coating with a solderable conductive composition a substrate comprising dissolving an organic polymeric matrix in a solvent; dispersing metal comprising nickel coated with saturated monocarboxylic acid therein to form a mixture; applying said mixture to a substrate, and then curing the mixture.
Claim 24
Dependent Claim
45 words
A process of coating with a solderable conductive composition a substrate comprising dissolving an organic polymeric matrix in a solvent; dispersing metal comprising nickel coated with saturated monocarboxylic acid therein to form a mixture; applying said mixture to a substrate, and then curing the mixture.
Claim 25
Dependent Claim
14 words
The process of claim 21 wherein the organic polymeric matrix is an epoxy resin.
Claim 26
Dependent Claim
12 words
The process of claim 22 wherein the solvent is butyl carbitol acetate.
Claim 27
Dependent Claim
28 words
The process of claim 21 wherein the mixture is cured at a temperature of from about 125° C. to about 200° for about 30 seconds to two hours.
Claim 28
Dependent Claim
15 words
The process of claim 21 wherein the saturated monocarboxylic acid is octadecanoic or n-heptadecanoic acid.
Claim 29
Dependent Claim
8 words
An article comprising the composition of claim 3.
Claim 30
Dependent Claim
10 words
The article of claim 26 comprising a printed circuit board.
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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) | 1988-10-21 | 1989-04-22 | 1989-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-21 | 1993-04-22 | 1993-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-21 | 1997-04-22 | 1997-10-22 | $7700.00 | Window Closed / Lapsed |