US3791027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soldering method
Assignee: International Business Machines Corp
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Filing: 1971-06-30
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Granted: 1974-02-12
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Expires: 1991-06-30
Abstract
Abstract There is disclosed the use of synthetic organic reactive polymer resins and other materials as soldering fluxes. These resins contain ''''chemical functionalities'''', i.e., radicals therein which provide active hydrogen for removing the oxides from the metal substrate during the soldering operation. There are essentially three types of applications as follows. The materials, distinct from known rosin fluxes, do not harden and may be easily removed with solvents. The chemical functionalities may be such that they result in resins which are thermoplastic and can remain on the solder joint to enable resoldering. Alternatively, the chemical functionalities can be chosen such that the resin fluxes chemically cross-link to form thermoset polymers which remains at the solder joint, the cross-linked polymers also functioning to reinforce the strength of the solder joint.
Inventors
- 👤 R Angelo
- 👤 A Balan
- 👤 D Huettner
- 👤 R Poliak
- 👤 J Shipley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:36
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/3613
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
In a soldering process for joining a plurality of metals wherein a flux is employed in said process to remove metallic oxides from the surfaces of said metals to be joined by said process and to promote metallurgical wetting of said metals, the improvement which comprises the step of: using as a flux in aid soldering process, synthetic polymers selected from the group consisting of; a mixture of carboxy terminated co-polymer of butadiene and acrylonitrile, a condensation polymer of epichlorohydrin and bisphenol-A, and a substituted amino methyl phenol, a mixture of a carboxy terminated polybutadiene and organic peroxides, a mixture of a carboxy-terminated polybutadiene resin, a heterocyclic diamine, methyl-bicyclo (2.2.1) hept-5-ene 2, 3 discarboxylic anhydride, a condensation polymer of epichlorohydrin and bisphenol-A, and a mixture of an acrylic ester-acid and a condensation polymer of epichlorohydrin and bisphenol-A.
Claim 2
Dependent Claim
72 words
In a soldering process for joining a plurality of metals wherein a flux is employed in said process to remove metallic oxides from the surfaces of said metals to be joined by said process and to promote metallurgical wetting of said metals, the improvement which comprises the step of: using as a flux in said soldering process, a heterocyclic diamine, and a diglycidal ether of bisphenol-A-epoxide resin diluted with butyl glyicdol ether.
Claim 3
Dependent Claim
71 words
In a soldering process for joining a plurality of metals wherein a flux is employed in said process to remove metallic oxides from the surfaces of said metals to be joined by said process and to promote metallurgical wetting of said metals, the improvement which comprises the step of: using as a flux in said soldering process, methyl-bicyclo (2.2.1) hept-5-ene 2, 3 dicarboxylic anhydride, and bis (3, 4-epoxy-6-methyl-cyclohexylmethyl adipate) and diethyltriamine.
Claim 4
Dependent Claim
66 words
In a soldering process for joining a plurality of metals wherein a flux is employed in said process to remove metallic oxides from the surfaces of said metals to be joined by said process and to promote metallurgical wetting of said metals, the improvement which comprises the step of: using as a flux in said soldering process, methyl-bicyclo (2.2.1) hept-5-ene 2, 3 dicarboXylic anhydride, and diethyltriamine.
Claim 5
Dependent Claim
73 words
In a soldering process for joining a plurality of metals wherein a flux is employed in said process to remove metallic oxides from the surfaces of said metals to be joined by said process and to promote metallurgical wetting of said metals, the improvement which comprises the step of: using as a flux in said soldering process, a diglycidal ether of bisphenol-A-epoxide resin diluted with butyl glyicdol ether and a carboxylated acrylic resin.
Claim 6
Dependent Claim
81 words
In a soldering process for joining a plurality of metals wherein a flux is employed in said process to remove metallic oxides from the surfaces of said metals to be joined by said process and to promote metallurgical wetting of said metals, the improvement which comprises the step of: using as a flux in said soldering process, the mixture of a diglycidal ether of bisphenol-A-epoxide resin diluted with butyl glyicdol ether, a substituted aminomethyl phenol, and a carboxy terminated polybutadiene resin.
Claim 7
Dependent Claim
67 words
In a soldering process for joining a plurality of metals wherein a flux is employed in aid process to remove metallic oxides from the surfaces of said metals to be joined by said process and to promote metallurgical wetting of said metals, the improvement which comprises the step of: using as flux in said soldering process, a mixture of a carboxy terminated polybutadiene resin and t-butyl perbenzoate.
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |