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Trost COW, Lassnig A, Kreiml P, Jörg T, Terziyska VL, Mitterer C, Cordill MJ. Enthalpy-Driven Self-Healing in Thin Metallic Films on Flexible Substrates. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2401007. [PMID: 38695220 DOI: 10.1002/adma.202401007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 04/02/2024] [Indexed: 05/12/2024]
Abstract
Self-healing microelectronics are needed for costly applications with limited or without access. They are needed in fields such as space exploration to increase lifetime and decrease both costs and the environmental impact. While advanced self-healing mechanisms for polymers are numerous, practical ways for self-healing in metal films have yet to be found. A concept for an autonomous intrinsic self-healing metallic film system is developed, allowing the healing of cracks in metallic films on flexible substrates. The concept relies on stabilizing metastable thin films with high mixing enthalpy via segregation barriers. This allows the films to possess autonomous intrinsic self-healing capabilities triggered by cracking at temperatures not detrimental to flexible microelectronics. The effect will be shown on metastable Mo1-xAgx thin films, stabilized via a Mo segregation barrier. Without a segregation barrier, the system is known to exhibit spontaneous Ag particle formation on the surface. This property is controlled and directed to heal cracks and partially restore the electro-mechanical properties of the multilayer system. This mechanism opens up the field of self-healing thin metallic films that could profoundly impact the design of future microelectronics.
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Affiliation(s)
- Claus Othmar Wolfgang Trost
- Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstrasse 12, Leoben, Styria, 8700, Austria
| | - Alice Lassnig
- Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstrasse 12, Leoben, Styria, 8700, Austria
- Department of Materials Science & Engineering, University of California, 170 Hearst Memorial Mining Building, Berkeley, California, 94720, USA
| | - Patrice Kreiml
- Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstrasse 12, Leoben, Styria, 8700, Austria
- Infineon Technologies Austria AG, Villach, Carinthia, 9500, Austria
| | - Tanja Jörg
- Department of Materials Science, Montanuniversität Leoben, Jahnstrasse 12, Leoben, Styria, 8700, Austria
- Austria Technologie & Systemtechnik (AT&S) Aktiengesellschaft, Fabriksgasse 13, Leoben, 8700, Styria, Austria
| | - Velislava L Terziyska
- Department of Materials Science, Montanuniversität Leoben, Jahnstrasse 12, Leoben, Styria, 8700, Austria
| | - Christian Mitterer
- Department of Materials Science, Montanuniversität Leoben, Jahnstrasse 12, Leoben, Styria, 8700, Austria
| | - Megan Jo Cordill
- Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstrasse 12, Leoben, Styria, 8700, Austria
- Department of Materials Science, Montanuniversität Leoben, Jahnstrasse 12, Leoben, Styria, 8700, Austria
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