Mechanics of rollable and foldable film-on-foil electronics

Z. Suo, E. Y. Ma, H. Gleskova, S. Wagner

Research output: Contribution to journalArticlepeer-review

525 Citations (Scopus)


The mechanics of film-on-foil devices is presented in the context of thin-film transistors on steel and plastic foils. Provided the substrates are thin, such transistors function well after the foils are rolled to small radii of curvature. When a substrate with a lower elastic modulus is used, smaller radii of curvature can be achieved. Furthermore, when the transistors are placed in the neutral surface by sandwiching between a substrate and an encapsulation layer, even smaller radii of curvature can be attained. Transistor failure clearly shows when externally forced and thermally induced strains add to, or subtract from, each other.

Original languageEnglish
Pages (from-to)1177-1179
Number of pages3
JournalApplied Physics Letters
Issue number8
Publication statusPublished - 1 Dec 1999


  • integrated circuit manufacture
  • thermal stresses
  • internal stresses


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