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Delamination of stiff islands patterned on stretchable substrates

  • Nanshu Lu , Juil Yoon und Zhigang Suo
Veröffentlicht/Copyright: 23. Mai 2013
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 98 Heft 8

Abstract

In one design of flexible electronics, thin-film islands of a stiff material are fabricated on a polymeric substrate, and functional materials are grown on these islands. When the substrate is stretched, the deformation is mainly accommodated by the substrate, and the islands and functional materials experience relatively small strains. Experiments have shown that, however, for a given amount of stretch, the islands exceeding a certain size may delaminate from the substrate. We calculate the energy release rate using a combination of finite element and complex variable methods. Our results show that the energy release rate diminishes as the island size or substrate stiffness decreases. Consequently, the critical island size is large when the substrate is compliant. We also obtain an analytical expression for the energy release rate of debonding islands from a very compliant substrate.

Keywords: Flexible electronics; Island size; Delamination; Complex potential
* Correspondence address, Zhigang Suo, Harvard University, School of Engineering and Applied Science, 29 Oxford St., Cambridge, MA 02138, USA, Tel.: +1617495 3789, Fax: +1617496 0601, E-mail:

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Received: 2007-3-23
Accepted: 2007-6-3
Published Online: 2013-05-23
Published in Print: 2007-08-01

© 2007, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial
  5. Basic
  6. In-situ measurement of local strain partitioning in a commercial dual-phase steel
  7. Threshold strength and residual stress analysis of zirconia–alumina laminates
  8. Threshold strength prediction for laminar ceramics from bifurcated crack path simulation
  9. First observation of a hexagonal close packed metastable intermetallic phase between Cu and Al bilayer films
  10. Electric-field induced phase transition in a near-surface layer of a PbMg0.33Nb0.67O3-28% PbTiO3 (001) single-crystalline plate
  11. Modelling the onset of oxide formation on metal surfaces from first principles
  12. Applied
  13. Delamination of stiff islands patterned on stretchable substrates
  14. Crack formation in surface layers with strain gradients
  15. Theta-like specimens for measuring mechanical properties at the small-scale: effects of non-ideal loading
  16. Indentation response of single-crystalline GaAs in the nano-, micro-, and macroregime
  17. Self-assembly of high-performance multi-tube carbon nanotube field-effect transistors by ac dielectrophoresis
  18. Biphasic, but monolithic scaffolds for the therapy of osteochondral defects
  19. Review
  20. Recent advances in piezospectroscopy
  21. Notifications
  22. DGM News
https://doi.org/10.3139/146.101529
Schlagwörter für diesen Artikel
Flexible electronics; Island size; Delamination; Complex potential

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial
  5. Basic
  6. In-situ measurement of local strain partitioning in a commercial dual-phase steel
  7. Threshold strength and residual stress analysis of zirconia–alumina laminates
  8. Threshold strength prediction for laminar ceramics from bifurcated crack path simulation
  9. First observation of a hexagonal close packed metastable intermetallic phase between Cu and Al bilayer films
  10. Electric-field induced phase transition in a near-surface layer of a PbMg0.33Nb0.67O3-28% PbTiO3 (001) single-crystalline plate
  11. Modelling the onset of oxide formation on metal surfaces from first principles
  12. Applied
  13. Delamination of stiff islands patterned on stretchable substrates
  14. Crack formation in surface layers with strain gradients
  15. Theta-like specimens for measuring mechanical properties at the small-scale: effects of non-ideal loading
  16. Indentation response of single-crystalline GaAs in the nano-, micro-, and macroregime
  17. Self-assembly of high-performance multi-tube carbon nanotube field-effect transistors by ac dielectrophoresis
  18. Biphasic, but monolithic scaffolds for the therapy of osteochondral defects
  19. Review
  20. Recent advances in piezospectroscopy
  21. Notifications
  22. DGM News
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