Abstract
Conductive adhesive tape is one kind of electromagnetic interference (EMI) shielding materials for electronic packaging. However, the inferior conductivity of the pressure-sensitive adhesive (PSA) layer results in serious electromagnetic leakage at the conjunctions between the conductive tapes and target objects. Adding conductive fillers is a traditional method for highly conductive adhesive tapes. However, the content of conductive fillers is needed to reach the percolation threshold, which is usually as high as tens of percent. High-content fillers result in significant loss of adhesive property and high fabrication cost. Herein, we introduce a rational architecture of conductive microsphere monolayer (CMM) in the PSA layer. The CMM connects the top and bottom surfaces of the PSA layer and improves its conductivity in the z-direction. Importantly, low contents of conductive microspheres (≤5 % (mass fraction, w)) can achieve the target of conductivity improvement, but not result in the serious loss of the adhesive property. Therefore, the strategy of CMMs can balance the tradeoff between the conductivity and the adhesive property of conductive PSA tapes. Finally, we demonstrate the superior EMI shielding performance of as-made conductive adhesive tapes, indicating their potential applications as the advanced EMI shielding materials in the electronic packaging.
Similar content being viewed by others
References
Huang JC (1995) EMI shielding plastics: a review. Adv Polym Tech 14:137–150
Devender RSR (1997) A review of EMI shielding and suppression materials. In: proceedings of the international conference on electromagnetic interference and compatibility 99, IEEE Cat. No. 99TH 8487. https://doi.org/10.1109/ICEMIC.1997.669850
Novák I, Florián Š (2003) Pressure-sensitive adhesives for electronic applications. J Mater Sci Lett 22:1237–1239
Li Y, Wong CP (2006) Recent advances of conductive adhesives as a lead-free alternative in electronic packaging: materials, processing, reliability and applications. Mater Sci Eng R Rep 51:1–35
Geetha S, Satheesh-Kumar KK, Rao CRK et al (2009) EMI shielding: methods and materials—a review. J Appl Polym Sci 112:2073–2086
Solin JR (2018) Shielding effectiveness of satellite faraday cages with EMI taped seams and closeouts. IEEE Electromag Compatib Mag 7:40–46
Madden CL (1968) EMI shielding with electrically conductive pressure sensitive tapes. In: 1968 8th electrical insulation conference. https://doi.org/10.1109/EIC.1968.7456093
Olyphant M (1967) RFI shielding with conductive pressure sensitive adhesive tapes. In: Paper presented at the 1967 IEEE Electromagnetic compatibility symposium record. https://doi.org/10.1109/ISEMC.1967.7570050
Costantino C (2003) Pressure-sensitive adhesives: an introductory course. MRS Bull 28:434–439
Mapari S, Mestry S, Mhaske ST (2020) Developments in pressure-sensitive adhesives: a review. Polym Bull 78:4075–4108
Droesbeke MA, Aksakal R, Simula A et al (2021) Biobased acrylic pressure-sensitive adhesives. Prog Polym Sci 117:101396. https://doi.org/10.1016/j.progpolymsci.2021.101396
Wang R, Yang H, Wang J et al (2014) The electromagnetic interference shielding of silicone rubber filled with nickel coated carbon fiber. Polym Test 38:53–56
Czech Z, Pełech R, Kowalczyk A et al (2011) Electrically conductive acrylic pressure-sensitive adhesives containing carbon black. Polish J Chem Technol 13:77–81
Czech Z, Kowalczyk A, Pełech R et al (2012) Using of carbon nanotubes and nano carbon black for electrical conductivity adjustment of pressure-sensitive adhesives. Int J Adhes Adhes 36:20–24
Czech Z, Kowalczyk A, Shao L et al (2013) Novel acrylic pressure-sensitive adhesive (PSA) containing silver particles. J Adhes Sci Technol 27:1446–1454
Park GH, Kim KT, Ahn YT et al (2014) The effects of graphene on the properties of acrylic pressure-sensitive adhesive. J Ind Eng Chem 20:4108–4111
Sanghvi MR, Tambare OH, More AP (2022) Performance of various fillers in adhesives applications: a review. Polym Bull. https://doi.org/10.1007/s00289-021-04022-z
Jia LC, Zhou CG, Sun WJ et al (2020) Water-based conductive ink for highly efficient electromagnetic interference shielding coating. Chem Eng J 384:123368. https://doi.org/10.1016/j.cej.2019.123368
Yi SQ, Sun H, Jin YF et al (2022) CNT-assisted design of stable liquid metal droplets for flexible multifunctional composites. Compos Part B Eng 239:109961. https://doi.org/10.1016/j.compositesb.2022.109961
Huang FW, Yang QC, Jia LC et al (2021) Aramid nanofiber assisted preparation of self-standing liquid metal-based films for ultrahigh electromagnetic interference shielding. Chem Eng J 426:131288. https://doi.org/10.1016/j.cej.2021.131288
Jia LC, Xu L, Ren F et al (2019) Stretchable and durable conductive fabric for ultrahigh performance electromagnetic interference shielding. Carbon 144:101–108
Masaebi N, Peighambardoust SJ, Ahadzadeh I (2018) Electrically conductive nanocomposite adhesives based on epoxy resin filled with silver coated nanocarbon black. J Mater Sci Mater Electron 29:11840–11851
Singh BP, Prabha SP, Gupta T et al (2011) Designing of multiwalled carbon nanotubes reinforced low density polyethylene nanocomposites for suppression of electromagnetic radiation. J Nanopart Res 13:7065–7074
Antosik AK, Mozelewska K, Pełech R et al (2021) Conductive electric tapes based on silicone pressure-sensitive adhesives. SILICON 13:867–875
Shahzad F, Alhabeb M, Hatter CB et al (2016) Electromagnetic interference shielding with 2D transition metal carbides (MXenes). Science 353:1137–1140
Iqbal A, Shahzad F, Hantanasirisakul K et al (2020) Anomalous absorption of electromagnetic waves by 2D transition metal carbonitride Ti3CNTx (MXene). Science 369:446–450
Wan YJ, Wang XY, Li XM et al (2020) Ultrathin densified carbon nanotube film with “metal-like” conductivity, superior mechanical strength, and ultrahigh electromagnetic interference shielding effectiveness. ACS Nano 14:14134–14145
Wang XY, Liao SY, Wan YJ et al (2022) Electromagnetic interference shielding materials: recent progress, structure design, and future perspective. J Mater Chem C 10:44–72
Jia LC, Jia XX, Sun WJ et al (2020) Stretchable liquid metal-based conductive textile for electromagnetic interference shielding. ACS Appl Mater Interfaces 12:53230–53238
Jia LC, Jin YF, Ren JW et al (2021) Highly thermally conductive liquid metal-based composites with superior thermostability for thermal management. J Mater Chem C 9:2904–2911
Zhao LH, Wang L, Jin YF et al (2022) Simultaneously improved thermal conductivity and mechanical properties of boron nitride nanosheets/aramid nanofiber films by constructing multilayer gradient structure. Composites Part B Eng 229:109454. https://doi.org/10.1016/j.compositesb.2021.109454
Xu Y, Lin Z, Rajavel K et al (2021) Tailorable, lightweight and superelastic liquid metal monoliths for multifunctional electromagnetic interference shielding. Nano-Micro Lett 14:29. https://doi.org/10.1007/s40820-021-00766-5
Liao SY, Li G, Wang XY et al (2022) Metallized skeleton of polymer foam based on metal–organic decomposition for high-performance EMI shielding. ACS Appl Mater Interfaces 14:3302–3314
Ding L, Ding ZY, Wei XC (2019) Shielding effectiveness measurement of SiP based on near-field acanning. In: 2019 IEEE international conference on integrated circuits, technologies and applications (ICTA). https://doi.org/10.1109/ICTA48799.2019.9012921
Ding L, Wei XC, Tang ZY et al (2021) Near-field scanning based shielding effectiveness analysis of system in package. IEEE Trans Compon Packag Manuf Technol 11:1235–1242
Wei J, Lin Z, Lei Z et al (2022) Lightweight and highly compressible expandable polymer microsphere/silver nanowire composites for wideband electromagnetic interference shielding. ACS Appl Mater Interfaces 14:5940–5950
Acknowledgements
The authors are grateful for the financial support from the National Natural Science Foundation of China (Grant No. 62074154), Shenzhen Science and Technology Program (Grant Nos. JSGG20210802153000002, JCYJ20210324102208023).
Author information
Authors and Affiliations
Corresponding authors
Rights and permissions
Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Lu, X., He, JM., Xu, YD. et al. Conductive microsphere monolayers enabling highly conductive pressure-sensitive adhesive tapes for electromagnetic interference shielding. Adv. Manuf. 11, 212–221 (2023). https://doi.org/10.1007/s40436-022-00421-1
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s40436-022-00421-1