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23.1: Invited Paper : Models and Experiments of Mechanical Integrity for Flexible Displays
Author(s) -
Leterrier Yves,
Pinyol Albert,
Dumont Pierre,
Gilliéron Damien,
Mewani Vinodh,
Månson JanAnders,
Andersons Janis,
Bouten Piet,
Timmermans Peter
Publication year - 2008
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3069654
Subject(s) - brittleness , stiffness , materials science , ultimate tensile strength , structural integrity , focus (optics) , substrate (aquarium) , stress (linguistics) , computer science , composite material , structural engineering , mechanical engineering , engineering , optics , linguistics , oceanography , physics , philosophy , geology
Flexible displays present a challenging problem in terms of mechanical integrity, a result of the considerable hygro‐thermo‐mechanical contrast between the inorganic, brittle device layers and the compliant polymer substrates. This paper reviews the main approaches to study and identify the key factors, which control the mechanical stability of this class of displays. Focus is put on the analyses of residual stress and damage under tensile loading. Novel electro‐mechanical methods are used for accurate insight into critical phenomena. An important result is that the thickness and stiffness of the substrate control the critical strain for failure of the device layers.