Patent US4504007A successfully refreshed from Google Patents.
US4504007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solder and braze fluxes and processes for using the same
Assignee: International Business Machines Corp
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Filing: 1982-09-14
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Granted: 1985-03-12
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Expires: 2002-09-14
Abstract
Abstract In a soldering process for joining a plurality of metal components wherein a flux is employed to promote the process, the improvement comprises using as a flux in the process a flux consisting essentially of dihydroabietyl alcohol or dihydroabietyl alcohol and a member selected from the group consisting of a thermally depolymerizable polymer or a mixture of thermally depolymerizable polymers having the structure: ##STR1## where X and Y are n-alkyl and iso-alkyl not exceeding 6 carbon atoms; halogen; --COOR where R is n-alkyl and iso-alkyl not exceeding 6 carbon atoms; phenyl, naphthyl, tolyl and methyl-naphthyl groups; n is 5 to 500, and mixtures thereof.
Inventors
- 👤 Herbert R. Anderson, Jr.
- 👤 Constance J. Araps
- 👤 Richard A. Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:30
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/3613
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
104 words
In a soldering process for joining a plurality of metal components wherein a flux is employed to promote said process, the improvement which comprises the step of using a flux purified of impurities which might leave a residue, said flux consisting essentially of dihydroabietyl alcohol or dihydroabietyl alcohol and a member selected from the group consisting of thermally depolymerizable polymers having the structure: ##STR5## where X and Y are n-alkyl and iso-alkyl no exceeding 6 carbon atoms; halogen; --COOR where R is n-alkyl and iso-alkyl not exceeding 6 carbon atoms; phenyl, naphthyl, tolyl and methyl-naphthyl groups; n is 5 to 500, and mixtures thereof.
Claim 2
Dependent Claim
104 words
In a soldering process for joining a plurality of metal components wherein a flux is employed to promote said process, the improvement which comprises the step of using a flux purified of impurities which might leave a residue, said flux consisting essentially of dihydroabietyl alcohol or dihydroabietyl alcohol and a member selected from the group consisting of thermally depolymerizable polymers having the structure: ##STR5## where X and Y are n-alkyl and iso-alkyl no exceeding 6 carbon atoms; halogen; --COOR where R is n-alkyl and iso-alkyl not exceeding 6 carbon atoms; phenyl, naphthyl, tolyl and methyl-naphthyl groups; n is 5 to 500, and mixtures thereof.
Claim 3
Dependent Claim
37 words
The process of claim 1 wherein said metal components comprise an integrated circuit component having solder contacts extending therefrom for solder connection to complimentary contact areas on at least one of a inorganic and organic substrate carrier.
Claim 4
Dependent Claim
21 words
The process of claim 2 wherein said carrier is an alumina substrate and said contact areas comprise nickel coated molybdenum metallurgy.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein the thermally depolymerizable polymer is poly(alphamethylstyrene).
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein the thermally depolymerizable polymer is polyisobutylene.
Claim 7
Dependent Claim
89 words
A brazing paste comprising a metalliferious powder dispersed in a fugitive fluxing binder purified of impurities which might leave a residue, said fugitive fluxing binder consisting essentially of dihydroabietyl alcohol or dihydroabietyl alcohol and a member selected from the group consisting of thermally depolymerizable polymers having the structure: ##STR6## where X and Y are n-alkyl and iso-alkyl not exceeding 6 carbon atoms; halogen; --COOR where R is n-alkyl and iso-alkyl not exceeding 6 carbon atoms; phenyl, naphthyl, tolyl and methyl-naphthyl groups; n is 5 to 500, and mixtures thereof.
Claim 8
Dependent Claim
89 words
A brazing paste comprising a metalliferious powder dispersed in a fugitive fluxing binder purified of impurities which might leave a residue, said fugitive fluxing binder consisting essentially of dihydroabietyl alcohol or dihydroabietyl alcohol and a member selected from the group consisting of thermally depolymerizable polymers having the structure: ##STR6## where X and Y are n-alkyl and iso-alkyl not exceeding 6 carbon atoms; halogen; --COOR where R is n-alkyl and iso-alkyl not exceeding 6 carbon atoms; phenyl, naphthyl, tolyl and methyl-naphthyl groups; n is 5 to 500, and mixtures thereof.
Claim 9
Dependent Claim
19 words
The brazing paste of claim 6 wherein said powder is selected from the group consisting of gold and gold/tin.
Claim 10
Dependent Claim
13 words
The brazing paste of claim 6 wherein the thermally depolymerizable polymer is poly(alphamethylstyrene).
Claim 11
Dependent Claim
13 words
The brazing paste of claim 6 wherein the thermally depolymerizable polymer is polyisobutylene.
Claim 12
Dependent Claim
107 words
A process for brazing metallic elements to nickel coated molybdenum metallurgy comprising brazing said element to said metallurgy with a brazing paste of a metalliferious powder dispersed in a fugitive fluxing binder purified of impurities which might leave residue, said fugitive fluxing binder consisting essentially of dihydroabietyl alcohol or dihydroabietyl alcohol and a member selected from the group consisting of thermally depolymerizable polymers having the structure: ##STR7## where X and Y are n-alkyl and iso-alkyl not exceeding 6 carbon atoms; halogen; --COOR where R is n-alkyl and iso-alkyl not exceeding 6 carbon atoms; phenyl, naphthyl, tolyl and methyl-naphthyl groups; n is 5 to 500, and mixtures thereof.
Claim 13
Dependent Claim
107 words
A process for brazing metallic elements to nickel coated molybdenum metallurgy comprising brazing said element to said metallurgy with a brazing paste of a metalliferious powder dispersed in a fugitive fluxing binder purified of impurities which might leave residue, said fugitive fluxing binder consisting essentially of dihydroabietyl alcohol or dihydroabietyl alcohol and a member selected from the group consisting of thermally depolymerizable polymers having the structure: ##STR7## where X and Y are n-alkyl and iso-alkyl not exceeding 6 carbon atoms; halogen; --COOR where R is n-alkyl and iso-alkyl not exceeding 6 carbon atoms; phenyl, naphthyl, tolyl and methyl-naphthyl groups; n is 5 to 500, and mixtures thereof.
Claim 14
Dependent Claim
27 words
The process of claim 10 wherein said elements comprise contact pins and said metallurgy comprises contact areas extending from a conductor pattern of an alumina ceramic substrate.
Claim 15
Dependent Claim
12 words
The process of claim 10 wherein the thermally depolymerizable polymer is poly(alphamethylstyrene).
Claim 16
Dependent Claim
12 words
The process of claim 10 wherein the thermally depolymerizable polymer is polyisobutylene.
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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) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |