The cohesive crack and buckle delamination resistances of indium tin oxide (ITO) films on polymeric substrates with ductile metal interlayers

Chan Woo Yang, Jin Woo Park

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

This work presents the effect of inserting ductile metal interlayers on crack and buckling delamination resistances of indium tin oxide (ITO) on polymeric substrates. Ag is selected as an interlayer and is deposited on polyethylene terephthalate (PET) substrates in varying thicknesses. We dc sputter-deposit 150. nm-thick ITO onto PET substrates and evaluate mechanical resistances by measuring the strains at crack initiation and delamination under tension and compression, respectively. Compared to the samples without interlayers, both the crack and delamination resistances of ITO are significantly improved by Ag interlayers over a certain thickness. The increase in crystallinity of ITO by the interlayers results in cohesive strength improvement of ITO, which is the primary factor enhancing crack resistance. Enhanced adhesion strength by the interlayers seems to improve the delamination resistance. The internal stress relief afforded by the addition of interlayers is found to have negligible effects on crack resistance compared to crystallinity.

Original languageEnglish
Pages (from-to)2761-2766
Number of pages6
JournalSurface and Coatings Technology
Volume204
Issue number16-17
DOIs
Publication statusPublished - 2010 May 1

Fingerprint

Tin oxides
Delamination
indium oxides
Indium
tin oxides
Oxide films
oxide films
interlayers
cracks
Metals
Cracks
Substrates
Polyethylene Terephthalates
metals
Polyethylene terephthalates
polyethylene terephthalate
Stress relief
crystallinity
Bond strength (materials)
Crack initiation

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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N2 - This work presents the effect of inserting ductile metal interlayers on crack and buckling delamination resistances of indium tin oxide (ITO) on polymeric substrates. Ag is selected as an interlayer and is deposited on polyethylene terephthalate (PET) substrates in varying thicknesses. We dc sputter-deposit 150. nm-thick ITO onto PET substrates and evaluate mechanical resistances by measuring the strains at crack initiation and delamination under tension and compression, respectively. Compared to the samples without interlayers, both the crack and delamination resistances of ITO are significantly improved by Ag interlayers over a certain thickness. The increase in crystallinity of ITO by the interlayers results in cohesive strength improvement of ITO, which is the primary factor enhancing crack resistance. Enhanced adhesion strength by the interlayers seems to improve the delamination resistance. The internal stress relief afforded by the addition of interlayers is found to have negligible effects on crack resistance compared to crystallinity.

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