Source: https://patents.google.com/patent/US6367150
Timestamp: 2018-02-19 00:31:11
Document Index: 510484671

Matched Legal Cases: ['arts 3', 'arts 3', 'arts 2', 'arts 5', 'art 1', 'art 1', 'art 1', 'art 1', 'art\n1']

US6367150B1 - Solder flux compatible with flip-chip underfill material - Google Patents
Solder flux compatible with flip-chip underfill material
US6367150B1
US6367150B1 US09148506 US14850698A US6367150B1 US 6367150 B1 US6367150 B1 US 6367150B1 US 09148506 US09148506 US 09148506 US 14850698 A US14850698 A US 14850698A US 6367150 B1 US6367150 B1 US 6367150B1
US09148506
Kenneth J. Kirsten
Shell Epon 815 38
Esterified anhydride 42
Diethylene glycol dibutyl ether 20
Epon 815 38
Polyester Curing Agent 42
Diethylene Glycol Dibutyl Ether 10
Chemical Flux #2 Flux #3 Flux #4 Flux #5 Flux #6 Flux #7
MY722 5 parts
MY720 5 parts 3 parts 3 parts
UC 4221E 2 parts 2 parts 5 parts
Epon 828 5 parts
DEA 1 part
TEA 1 part 1 part 1 part 1 part 1 part
1. A method of electrically connecting an electrical component having a plurality of spaced apart electrical component electrical terminations to a substrate having a plurality of spaced apart substrate electrical terminations corresponding to the terminations of said electrical component to form a plurality of spaced apart electrical connections and then interfilling said electrical and substrate components with an encapsulant composition sandwiched therebetween to encase said spaced apart electrical connections comprising:
a) forming spaced apart electrical connections of said spaced apart component electrical terminations to said corresponding spaced apart substrate electrical terminations with solder at reflow soldering temperature utilizing an epoxy-based fluxing agent that leaves an epoxy-based fluxing agent residue that is partially cured on said spaced apart electrical connections and leaves open space between the spaced apart electrical connections with epoxy-based fluxing agent residue thereon;
b) filling said open space between said spaced apart electrical connections with partially cured epoxy-based fluxing agent residue thereon with an epoxy underfill encapsulant that co-cures with the epoxy-based fluxing agent residue; and then
c) co-curing said epoxy underfill encapsulant and epoxy-based fluxing agent residue to form a bond at the interface of said epoxy based underfill encapsulant and epoxy-based fluxing agent residue.
2. The method of claim 1, wherein the epoxy-based fluxing agent comprises an epoxy resin and a cross-linking agent which, when used in combination, provide a level of flux activity to clean the surface metal oxides of the solder used to form said electrical connections and to provide latency during a preselected solder reflow profile.
US09148506 1997-09-05 1998-09-04 Solder flux compatible with flip-chip underfill material Active US6367150B1 (en)
US5758797 true 1997-09-05 1997-09-05
US09148506 US6367150B1 (en) 1997-09-05 1998-09-04 Solder flux compatible with flip-chip underfill material
US10051661 US6615484B2 (en) 1997-09-05 2002-01-18 Method of manufacturing an electrical connection using solder flux compatible with flip chip underfill material
US10051661 Continuation US6615484B2 (en) 1997-09-05 2002-01-18 Method of manufacturing an electrical connection using solder flux compatible with flip chip underfill material
US6367150B1 true US6367150B1 (en) 2002-04-09
ID=26736666
US09148506 Active US6367150B1 (en) 1997-09-05 1998-09-04 Solder flux compatible with flip-chip underfill material
US10051661 Active US6615484B2 (en) 1997-09-05 2002-01-18 Method of manufacturing an electrical connection using solder flux compatible with flip chip underfill material
US (2) US6367150B1 (en)
US6562482B1 (en) 1999-03-15 2003-05-13 Sumitomo Bakelite Company, Ltd. Liquid potting composition
WO2015193684A1 (en) * 2014-06-19 2015-12-23 Alpha Metals, Inc. Engineered residue solder paste technology
US9802275B2 (en) * 2013-12-31 2017-10-31 Alpha Assembly Solutions Inc. Rosin-free thermosetting flux formulations
US3449641A (en) 1966-01-11 1969-06-10 Gen Electric Epoxy encapsulated semiconductor device wherein the encapsulant comprises an epoxy novolak
US3791027A (en) 1971-06-30 1974-02-12 Ibm Soldering method
US20020095783A1 (en) 2002-07-25 application
US6615484B2 (en) 2003-09-09 grant
US20080156852A1 (en) 2008-07-03 Solder flux composition and process of using same
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KIRSTEN, KENNETH J.;REEL/FRAME:012369/0202