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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 5196070 B1

PDFFull Text
Date of Patent:
Mar. 23, 1993

Filed:

Dec. 31, 1991

Thermally stable water soluble solder flux and paste

Applicant:
Inventors:

Wallace H Ables, Apalachin, NY (US);

Dwight R Howle, Cedar Park, TX (US);

John S Humphrey, Austin, TX (US);

Robert G Raines, Austin, TX (US);

Richard A Reich, Georgetown, TX (US);

Robert A Sorensen, Poway, CA (US);

Robert Valdez, Round Rock, TX (US);

Abdoul R Zamani, Austin, TX (US);

Assignee:

International Business Machines Corporation, Armonk, NY (US);

Attorneys:

Yee; Duke W.

Dillon; Andrew J.

Primary Examiner:

Peter D Rosenberg

Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
148 23 ; 148 24 ; 148 25 ;
Abstract

A water soluble, thermally stable, solder flux for use in forming a water soluble, thermally stable, solder paste is provided. The water soluble, thermally stable, solder flux contains an acidic ester component having about 50% to about 60% monoesters by weight based on total weight, about 40% to about 50% diesters by weight based on total weight, and about 0% to about 1.5% phosphoric acid by weight based on total weight. This ester component is combined with triethanolamine to form a flux vehicle having a molar ratio of triethanolamine to the ester component of about 0.6 to about 1.2. This vehicle is present in the solder flux in an amount from about 68% to about 79% by weight based on total weight of solder flux. The flux also contains rheology adjusting components in an amount ranging from about 17% to about 26% by weight based on total weight of solder flux. Citric acid included in the flux in an amount ranging from about 4% to about 6% by weight based on total weight of solder flux.

Find Patent Forward Citations

Ables, Wallace. (1993). Thermally stable water soluble solder flux and paste (U.S. Patent No. 5196070). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5196070

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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