US5177134A
Expired / Lapsed
US
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Tacking agent
Assignee: Motorola Solutions Inc
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Filing: 1990-12-03
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Granted: 1993-01-05
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Expires: 2010-12-03
Abstract
Abstract A tacking agent is provided for use in temporarily adhering electronic components and providing fluxing properties for soldering electronic assemblies. The tacking agent comprises a fluxing agent and a tackifier. The fluxing agent is composed of one or more carboxylic acids having the formula ##STR1## where R is an alkyl group containing from 1 to 6 carbon atoms, R' is selected from the group consisting of hydrogen and hydroxyl, and R" is selected from the group consisting of hydrogen, hydroxyl and carboxyl. The tackifier comprises one or more alcohols, aromatic hydrocarbon solvents, aliphatic hydrocarbon solvents, or polymers. The tacking agent is deposited onto a printed circuit board or other substrate, the electronic components are placed into the deposited tacking agent and soldered. During solder reflow the fluxing agent provides fluxing action for the soldering process, and the tackifier volatilizes, leaving little or no residue on the printed circuit board.
Inventors
- 👤 William B. Mullen, III
- 👤 Anthony B. Suppelsa
- 👤 Robert W. Pennisi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:18
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/02; B23K35/3618; C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; H; H05; H05K; H05K3/00; H05K3/30; H05K3/303; H05K3/305; H05K3/32; H05K3/34; H05K3/3489; H05K2203/00; H05K2203/04; H05K2203/0485; Y; Y02; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
119 words
A tacking agent suitable for temporarily fixturing electronic components and serving as a solder flux, consisting essentially of: a carboxylic acid compound having the property of vaporizing or decomposing at temperatures between ambient and 300° C., in an amount effective to serve as a solder flux; one or more alcohol thickeners having one or more hydroxyl groups, suitable for forming a viscous solution or suspension of the carboxylic acid compound, said viscous solution having a viscosity of between 20 and about 1500 centipoise, and said alcohol thickener also serving as a fugitive solvent by vaporizing or decomposing between said temperatures; and one or more materials selected from the group consisting of polyisobutylene, polyacrylates, alpha-substituted polyesters, polyterpenes, and organic carbonates.
Claim 2
Dependent Claim
119 words
A tacking agent suitable for temporarily fixturing electronic components and serving as a solder flux, consisting essentially of: a carboxylic acid compound having the property of vaporizing or decomposing at temperatures between ambient and 300° C., in an amount effective to serve as a solder flux; one or more alcohol thickeners having one or more hydroxyl groups, suitable for forming a viscous solution or suspension of the carboxylic acid compound, said viscous solution having a viscosity of between 20 and about 1500 centipoise, and said alcohol thickener also serving as a fugitive solvent by vaporizing or decomposing between said temperatures; and one or more materials selected from the group consisting of polyisobutylene, polyacrylates, alpha-substituted polyesters, polyterpenes, and organic carbonates.
Claim 3
Dependent Claim
118 words
A tacking agent suitable for temporarily fixturing electronic components and serving as a solder flux, consisting essentially of; a carboxylic acid compound having the property of vaporizing or decomposing at temperatures between ambient and 300° C., in an amount effective to serve as a solder flux; one or more alcohol thickeners having one or more hydroxyl groups, suitable for forming a viscous solution or suspension of the carboxylic acid compound, said viscous solution having a viscosity of between 20 and about 1500 centipoise, and said alcohol thickener also serving as a fugitive solvent by vaporizing or decomposing between said temperatures; and an electrically non-conducting encapsulant material having a melting point between about 45 and about 260 degrees C.
Claim 4
Dependent Claim
118 words
A tacking agent suitable for temporarily fixturing electronic components and serving as a solder flux, consisting essentially of; a carboxylic acid compound having the property of vaporizing or decomposing at temperatures between ambient and 300° C., in an amount effective to serve as a solder flux; one or more alcohol thickeners having one or more hydroxyl groups, suitable for forming a viscous solution or suspension of the carboxylic acid compound, said viscous solution having a viscosity of between 20 and about 1500 centipoise, and said alcohol thickener also serving as a fugitive solvent by vaporizing or decomposing between said temperatures; and an electrically non-conducting encapsulant material having a melting point between about 45 and about 260 degrees C.
Claim 5
Dependent Claim
13 words
The tacking agent of claim 2, wherein the encapsulant material comprises carnauba wax.
Claim 6
Dependent Claim
104 words
A tacking agent suitable for temporarily fixturing electronic components and serving as a solder flux, consisting essentially of; a carboxylic acid compound having the property of vaporizing or decomposing at temperatures between ambient and 300° C., in an amount effective to serve as a solder flux; one or more alcohol thickeners having one or more hydroxyl groups, suitable for forming a viscous solution or suspension of the carboxylic acid compound, said viscous solution having a viscosity of between 20 and about 1500 centipoise, and said alcohol thickener also serving as a fugitive solvent by vaporizing or decomposing between said temperatures; and a photodegradable polymer.
Claim 7
Dependent Claim
104 words
A tacking agent suitable for temporarily fixturing electronic components and serving as a solder flux, consisting essentially of; a carboxylic acid compound having the property of vaporizing or decomposing at temperatures between ambient and 300° C., in an amount effective to serve as a solder flux; one or more alcohol thickeners having one or more hydroxyl groups, suitable for forming a viscous solution or suspension of the carboxylic acid compound, said viscous solution having a viscosity of between 20 and about 1500 centipoise, and said alcohol thickener also serving as a fugitive solvent by vaporizing or decomposing between said temperatures; and a photodegradable polymer.
Claim 8
Dependent Claim
24 words
The tacking agent of claim 4, wherein the photodegradable polymer is a polymer selected from the group consisting of polyesters, polyacrylates and diene resins.
Claim 9
Dependent Claim
182 words
A tacking agent for use in temporarily adhering components and serving as a solder flux, consisting essentially of; a fluxing agent composed of a dicarboxylic acid compound having the formula ##STR3## where R is an alkyl group containing from 1 to 6 carbon atoms, R' is selected from the group consisting of hydrogen and hydroxyl, and R" is selected from the group consisting of hydrogen, hydroxyl and carboxyl; and wherein the proportion of the dicarboxylic acid ranges from about 0.1 to about 10 weight percent of the tacking agent; a tackifier suitable for forming a viscous solution or suspension of the dicarboxylic acid, comprising one or more materials selected from the group consisting of; alcohols having the formula R--OH or HO--R--OH, where R is an alkyl group containing from 1 to 12 carbon atoms, or R is an aromatic group; a material selected from the group consisting of polyisobutylene, polyacrylates, alpha-substituted polyesters, polyterpenes, and organic carbonates; and aromatic hydrocarbon solvents and aliphatic hydrocarbon solvents; and an electrically non-conducting encapsulant material having a melting point between about 45 and about 260 degrees C.
Claim 10
Dependent Claim
182 words
A tacking agent for use in temporarily adhering components and serving as a solder flux, consisting essentially of; a fluxing agent composed of a dicarboxylic acid compound having the formula ##STR3## where R is an alkyl group containing from 1 to 6 carbon atoms, R' is selected from the group consisting of hydrogen and hydroxyl, and R" is selected from the group consisting of hydrogen, hydroxyl and carboxyl; and wherein the proportion of the dicarboxylic acid ranges from about 0.1 to about 10 weight percent of the tacking agent; a tackifier suitable for forming a viscous solution or suspension of the dicarboxylic acid, comprising one or more materials selected from the group consisting of; alcohols having the formula R--OH or HO--R--OH, where R is an alkyl group containing from 1 to 12 carbon atoms, or R is an aromatic group; a material selected from the group consisting of polyisobutylene, polyacrylates, alpha-substituted polyesters, polyterpenes, and organic carbonates; and aromatic hydrocarbon solvents and aliphatic hydrocarbon solvents; and an electrically non-conducting encapsulant material having a melting point between about 45 and about 260 degrees C.
Claim 11
Dependent Claim
13 words
The tacking agent of claim 6, wherein the encapsulant material comprises carnauba wax.
Claim 12
Dependent Claim
168 words
A tacking agent for use in temporarily adhering components and serving as a solder flux, consisting essentially of; a fluxing agent composed of a dicarboxylic acid compound having the formula ##STR4## where R is an alkyl group containing from 1 to 6 carbon atoms, R' is selected from the group consisting of hydrogen and hydroxyl, and R" is selected from the group consisting of hydrogen, hydroxyl and carboxyl; and wherein the proportion of the dicarboxylic acid ranges from about 0.1 to about 10 weight percent of the tacking agent; a tackifier suitable for forming a viscous solution or suspension of the dicarboxylic acid, comprising one or more materials selected from the group consisting of; alcohols having the formula R--OH or HO--R--OH, where R is an alkyl group containing from 1 to 12 carbon atoms, or R is an aromatic group; a material selected from the group consisting of polyisobutylene, polyacrylates, alpha-substituted polyesters, polyterpenes, and organic carbonates; and aromatic hydrocarbon solvents and aliphatic hydrocarbon solvents; and a photo-degradable polymer.
Claim 13
Dependent Claim
168 words
A tacking agent for use in temporarily adhering components and serving as a solder flux, consisting essentially of; a fluxing agent composed of a dicarboxylic acid compound having the formula ##STR4## where R is an alkyl group containing from 1 to 6 carbon atoms, R' is selected from the group consisting of hydrogen and hydroxyl, and R" is selected from the group consisting of hydrogen, hydroxyl and carboxyl; and wherein the proportion of the dicarboxylic acid ranges from about 0.1 to about 10 weight percent of the tacking agent; a tackifier suitable for forming a viscous solution or suspension of the dicarboxylic acid, comprising one or more materials selected from the group consisting of; alcohols having the formula R--OH or HO--R--OH, where R is an alkyl group containing from 1 to 12 carbon atoms, or R is an aromatic group; a material selected from the group consisting of polyisobutylene, polyacrylates, alpha-substituted polyesters, polyterpenes, and organic carbonates; and aromatic hydrocarbon solvents and aliphatic hydrocarbon solvents; and a photo-degradable polymer.
Claim 14
Dependent Claim
24 words
The tacking agent of claim 8, wherein the photodegradable polymer is a polymer selected from the group consisting of polyesters, polyacrylates and diene resins.
Claim 15
Dependent Claim
89 words
A tacking agent for use in soldering electronic assemblies, comprising: malic acid, where the proportion of malic acid ranges from about 0.1 to about 10 weight percent of the tacking agent; a thickener selected from the group consisting of polyisobutylene, polyacrylates, alpha-substitute polyesters, polyterpenes, and organic carbonates; and a solvent suitable for forming a viscous solution or suspension of the malic acid and the thickener, said viscous solution or suspension having a viscosity of between about 20 and about 1500 centipoise, the solvent vaporizing while soldering the electronic assemblies.
Claim 16
Dependent Claim
89 words
A tacking agent for use in soldering electronic assemblies, comprising: malic acid, where the proportion of malic acid ranges from about 0.1 to about 10 weight percent of the tacking agent; a thickener selected from the group consisting of polyisobutylene, polyacrylates, alpha-substitute polyesters, polyterpenes, and organic carbonates; and a solvent suitable for forming a viscous solution or suspension of the malic acid and the thickener, said viscous solution or suspension having a viscosity of between about 20 and about 1500 centipoise, the solvent vaporizing while soldering the electronic assemblies.
Claim 17
Dependent Claim
28 words
The tacking agent of claim 10, wherein the tacking agent further comprises a dielectric encapsulant material having a melting point between about 45 and about 260 degrees C.
Claim 18
Dependent Claim
13 words
The tacking agent of claim 11, wherein the encapsulant material comprises carnauba wax.
Claim 19
Dependent Claim
30 words
The tacking agent of claim 10, wherein the tacking agent further comprises a photo-degradable polymer selected from the group consisting of polyesters, polyacrylates carbonate polymers, organic carbonates and diene resins.
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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) | 1996-01-05 | 1996-07-06 | 1997-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-05 | 2000-07-06 | 2001-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-05 | 2004-07-06 | 2005-01-05 | $7700.00 | Window Closed / Lapsed |