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http://dx.doi.org/10.6117/kmeps.2020.27.3.049

Development of Epoxy Based Stretchable Conductive Adhesive  

Nam, Hyun Jin (ICT device packaging Research Center, Korea Electronics Technology Institute (KETI))
Lim, Ji Yeon (ICT device packaging Research Center, Korea Electronics Technology Institute (KETI))
Lee, Chang Hoon (ICT device packaging Research Center, Korea Electronics Technology Institute (KETI))
Park, Se-Hoon (ICT device packaging Research Center, Korea Electronics Technology Institute (KETI))
Publication Information
Journal of the Microelectronics and Packaging Society / v.27, no.3, 2020 , pp. 49-54 More about this Journal
Abstract
To attach a stretchable/flexible electrode to something or something to on electrode, conductive adhesives must be stretchable/flexible to suit the properties of the electrode. In particular, conductive adhesive require durability and heat resistance, and unlike conventional adhesives, they should also have conductivity. To this end, Epoxy, which has good strength and adhesion, was selected as an adhesive, and a plasticizer and a reinforcement were mixed instead of a two-liquid material consisting of a conventional theme and a hardener, and a four-liquid material was used to give stretchability/flexibility to high molecules. The conductive filler was selected as silver, a material with low resistance, and for high conductivity, three shapes of Ag particles were used to increase packing density. Conductivity was compared with these developed conductive adhesives and two epoxy-based conductive adhesives being sold in practice, and about 10 times better conductivity results were obtained than products being actually sold. In addition, conductivity, mechanical properties, adhesion and strength were evaluated according to the presence of plasticizers and reinforcement agent. There was also no problem with 60% tensile after 5 minutes of curing at 120℃, and pencil hardness was excellently measured at 6H. As a result of checking the adhesion of electrodes through 3M tape test, all of them showed excellent results regardless of the mixing ratio of binders. After attaching the Cu sheet on top of the electrode through conductive adhesive, the contact resistance was checked and showed excellent performance with 0.3 Ω.
Keywords
Stretchable/flexible conductive adhesive; High hardness; Rapid thermal curing; High conductivity;
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Times Cited By KSCI : 3  (Citation Analysis)
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