Electrical and optical Ca test result. Measurements were carried out at 85 °C and 85% RH.
Photographs showing bending tests of the samples with various bending radii.
Electrical Ca test results for structures (I)–(IV) with different bending radii.
Electrical Ca test results showing the reduction in moisture-barrier performance after 10 000 bending cycles at different bending radii for structures (I)–(VI). Reprinted with permission from S.-W. Seo, H. Chae, S. J. Seo, H. K. Chung, and S. M. Cho, Appl. Phys. Lett. 102, 161908 (2013). Copyright 2013 American Institute of Physics.
Theoretically calculated tensile strain on Al2O3 surface for three different model structures representing structures (I)–(VIII).
Comparison of the calculated tensile strain with the experimental Ca test results for structures (I)–(VI).
(a) Electrical Ca test results of multilayer structures in a neutral plane before and after 10 000 bending cycles with different bending radii. (b) The effect of a neutral-plane location of structure (VII) and (VIII) on reducing moisture-barrier performance after cyclic bending experiments.
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