Patent US4360144A successfully refreshed from Google Patents.
US4360144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed circuit board soldering
Assignee: BASF Corp
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Filing: 1981-01-21
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Granted: 1982-11-23
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Expires: 2001-01-21
Abstract
Abstract The present invention relates to a method of wave soldering an assembly composed of a plurality of electrical conductors disposed on a surface of a sheet of insulating material. In accordance with this method, the surface of the sheet and the conductors are contacted with a stationary wave of molten solder having a polyether admixed therewith and floating on the surface thereof. The polyether is a heteric or block copolymer of a dihydroxyphenol and at least one lower alkylene oxide. It is preferred that the alkylene oxide contain 2 to 4 carbon atoms. The alkylene oxide may be all ethylene oxide or may be a mixture with other lower alkylene oxides such as propylene oxides and butylene oxides. In any event, the copolymer should contain at least about 20 percent by weight of oxyethylene groups, balance oxypropylene groups and/or oxybutylene groups. A conventional polymeric oxidation inhibitor may also be included.
Inventors
- 👤 William A. Cuddy
- 👤 Basil Thir
- 👤 Stephen E. Eisenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:24
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/3613; H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/3489; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49144
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
84 words
A method of wave soldering an assembly comprised of a plurality of electrical conductors disposed on a surface of a sheet of insulating material comprising contacting said surface of said sheet and said conductors with a stationary wave consisting essentially of molten solder and a polyether admixed therewith and floating on the surface thereof, said polyether being the heteric or block copolymer of a dihydroxyphenol and at least one lower alkylene oxide, said copolymer containing at least about 20 percent by weight oxyethylene groups.
Claim 2
Independent Claim
84 words
A method of wave soldering an assembly comprised of a plurality of electrical conductors disposed on a surface of a sheet of insulating material comprising contacting said surface of said sheet and said conductors with a stationary wave consisting essentially of molten solder and a polyether admixed therewith and floating on the surface thereof, said polyether being the heteric or block copolymer of a dihydroxyphenol and at least one lower alkylene oxide, said copolymer containing at least about 20 percent by weight oxyethylene groups.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said lower alkylene oxide contains 2 to 4 carbon atoms.
Claim 4
Dependent Claim
11 words
The method of claim 2 wherein said dihydroxy phenol is 2,2-bis(4-hydroxyphenyl)propane.
Claim 5
Dependent Claim
17 words
The method of claim 2 wherein said copolymer has a molecular weight of about 500 to 3000.
Claim 6
Dependent Claim
22 words
The method of claim 4 wherein the amount of said copolymer is about 0.05 to 2.0 percent by weight of said solder.
Claim 7
Dependent Claim
11 words
The method of claim 5 wherein said dihydroxy phenol is 2,2-bis(4-hydroxyphenyl)propane.
Claim 8
Dependent Claim
19 words
The method of claim 5 wherein said molten solder is at a temperature of about 350° to 650° F.
Claim 9
Dependent Claim
17 words
The method of claim 5 wherein said solder also contains a copolymer of dicyclopentadiene and para cresol.
Claim 10
Dependent Claim
21 words
The method of claim 5 wherein said solder also contains an organic acid of from about 12 to 22 carbon atoms.
Claim 11
Dependent Claim
17 words
The method of claim 9 wherein said solder also contains a copolymer of dicyclopentadiene and para cresol.
Claim 12
Dependent Claim
11 words
The method of claim 9 wherein said dihydroxy phenol is 2,2-bis(4-hydroxyphenyl)propane.
Claim 13
Dependent Claim
18 words
The method of claim 9 wherein said solder is at a temperature of about 350° to 650° F.
Claim 14
Dependent Claim
18 words
The method of claim 10 wherein said solder is at a temperature of about 350° to 650° F.
Claim 15
Dependent Claim
11 words
The method of claim 13 wherein said dihydroxy phenol is 2,2-bis(4-hydroxyphenyl)propane.
Claim 16
Dependent Claim
12 words
The method of claim 14 wherein said organic acid is oleic acid.
Claim 17
Dependent Claim
97 words
In a method of wave soldering an assembly comprised of a plurality of electrical conductors disposed on a surface of a sheet of insulating material comprising contacting said surface of said sheet and said conductors with a stationary wave consisting essentially of molten solder and a polyether admixed therewith and floating on the surface thereof, the improvement for eliminating or substantially reducing fuming at elevated temperatures wherein said polyether is the heteric or block copolymer of a dihydroxyphenol and at least one lower alkylene oxide, said copolymer containing at least about 20 percent by weight oxyethylene groups.
Claim 18
Dependent Claim
97 words
In a method of wave soldering an assembly comprised of a plurality of electrical conductors disposed on a surface of a sheet of insulating material comprising contacting said surface of said sheet and said conductors with a stationary wave consisting essentially of molten solder and a polyether admixed therewith and floating on the surface thereof, the improvement for eliminating or substantially reducing fuming at elevated temperatures wherein said polyether is the heteric or block copolymer of a dihydroxyphenol and at least one lower alkylene oxide, said copolymer containing at least about 20 percent by weight oxyethylene groups.
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) | 1985-11-22 | 1986-05-24 | 1986-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-22 | 1990-05-24 | 1990-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-22 | 1994-05-24 | 1994-11-23 | $7700.00 | Window Closed / Lapsed |