Backward and Forward Compatibility

Pan, Jianbiao; Bath, Jasbir; Zhou, Xiang; Willie, Dennis

doi:10.1007/978-0-387-68422-2_7

Cited by 1 publication

(1 citation statement)

References 12 publications

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“…As shown in Figure 6 E, there was very little weight loss of EGS-80 as compared with that of the solder paste that contained volatile solvents and fluxes. In addition, Figure 6 F,G and Video S5 reveal that EGS-80 maintained its shape without being pushed out of the pads below the liquidous temperature of SAC305 [ 45 ]. This characteristic is preferable because otherwise the solder particles may spread around the pads and lead to a short circuit between the joints.…”

Section: Resultsmentioning

confidence: 99%

Thermochemical Mechanism of the Epoxy-Glutamic Acid Reaction with Sn-3.0 Ag-0.5 Cu Solder Powder for Electrical Joining

et al. 2021

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An epoxy-based solder paste (ESP) is a promising alternative to conventional solder pastes to improve the reliability of fine-pitch electrical joining because the epoxy encapsulates the solder joint. However, development of an appropriate epoxy formulation and investigation of its reaction mechanism with solder powder is challenging. In this study, we demonstrate a newly designed ESP consisting of diglycidyl ether of bisphenol F (DGEBF) resin, Sn-3.0 Ag-0.5 Cu (SAC305) solder powder, and L-glutamic acid (Glu), which is a proteinogenic amino acid for biosynthesis of proteins in living systems. The mechanism of the thermochemical reaction was explored and tentatively proposed, which reveals that the products of the reaction between SAC305 and Glu function as catalysts for the etherification of epoxides and alcohols produced by chemical bonding between DGEBF and Glu, consequently leading to highly crosslinked polymeric networks and an enhancement of impact resistance. Our findings provide further insight into the mechanism of the reaction between various formulations comprising an epoxy, amino acid, and solder powder, and their potential use as ESPs for electrical joining.

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Section: Resultsmentioning

confidence: 99%