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Flexible PLED displays and related technologies

Published online by Cambridge University Press:  17 March 2011

G. Nisato
Affiliation:
Philips Electronics, Eindhoven, the, Netherlands
C. Mutsaers
Affiliation:
Philips Electronics, Eindhoven, the, Netherlands
H. Buijk
Affiliation:
Philips Electronics, Eindhoven, the, Netherlands
P. Duineveld
Affiliation:
Philips Electronics, Eindhoven, the, Netherlands
E. Janssen
Affiliation:
Philips Electronics, Eindhoven, the, Netherlands
J. de Goede
Affiliation:
Philips Electronics, Eindhoven, the, Netherlands
P. Bouten
Affiliation:
Philips Electronics, Eindhoven, the, Netherlands
H. Zuidema
Affiliation:
Philips Electronics, Eindhoven, the, Netherlands
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Abstract

Flexible, free shape displays are the enabling technology for new robust, lightweight, extremely thin, portable electronic devices. Polymer Light Emitting Diodes (PLED) are especially suited for these applications, due to their fast response time, low voltage, high luminous efficiency and viewing angle performance. On the other hand, PLED displays are extremely sensitive to moisture and oxygen. Substrate materials provided with high performance hermetic and conducting layers are therefore an essential component for manufacturing these flexible devices. Polymer based substrates provide the necessary mechanical flexibility; they also require several thin, brittle, functional inorganic layers such diffusion barriers and transparent electrodes. The structural integrity, dimensional stability and thermal properties of the substrate stack are crucial to insure device functionality and reliability. For polymer-based substrate several effects lead to dimensional variation of the substrates, such as solvent uptake, physical ageing of the polymer base, thermal expansion and stress induced deformations. These effects must be taken into account to successfully perform classic photolithographic steps.

Ink-jet printing is a critical enabling technology for flexible PLED displays, providing a customizable means to dispense solution-based polymers onto a flexible substrate, allowing for multi-color devices. On the other hand, IJP must meet several challenges, especially to comply with industrial applications. For example, accurate landing position of the droplets to form homogeneous hole-transport and electroluminescent layers as well as good wetting characteristic of the substrates must be obtained with reliable high throughput techniques.

Type
Research Article
Copyright
Copyright © Materials Research Society 2004

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References

1. Haskal, E.I., Büchel, M., Duineveld, P.C., Sempel, A.H., Weijer, P. van der, Passive-matrix polymer light-emitting displays, MRS Bull. 27, 864869, 2002.Google Scholar
2. Lewis, J. S. and Weaver, M. S., JSTQE, 10-, 45, 2004 Google Scholar
3. Leterrier, Y., ”Durability of nanosized gas-barrier coatings on polymers”, in press in Prog. Mater. Sci. 2002 Google Scholar
4. Nisato, G., Bouten, P.C.P., Slikkerveer, P.J., Bennett, W.D. W.D., , Graff, G.L., Rutherford, N., Wiese, L., Proceedings Asia Display/IDW 2001, p.1435, 2001Google Scholar
5. Nisato, G., Kuilder, M/., Bouten, P.C.P., Moro, L., Philips, O., Rutherford, N., Proceedings SID2003 P88, 2003 Google Scholar
6. Burrows, P. E., Graff, G. L., Hall, M. and Gross, M. E., Proceedings Spring MRS I1.2, 2004 Google Scholar
7. Bouten, P.C.P., Failure test for brittle conductive layers on flexible display substrates, Proc. EuroSID, Nice, 1-4, pp. 313316, 2002 Google Scholar
8. Leterrier, Y., Fischer, C., Médico, L., Demarco, F., Månson, J.-A. E., Bouten, P.C.P, Goede, J. de, Nisato, G., airn, J.A., “Mechanical Properties of Transparent Functional Thin Films for Flexible Displays”, Proc. 46th SVC Ann. Conf., San-Francisco, May 3-8, 2003 Google Scholar
9. Y, Y. Leterrier, Médico, L., Demarco, F., Månson, J.-A., Escola-Figuera, M., Kharrazi-Olsson, M., Betz, U., Atamny, F., “Mechanical Integrity of Transparent Conductive Oxide Films for Flexible Polymer- Based Displays” in press in Thin Solid Films, 2004 Google Scholar
10. Lawn, B., Fracture of brittle solids, second edition, Cambridge University Press, Cambridge 1993 Google Scholar
11. Sirringhaus, H. and Shimoda, T., “Inkjet printing of functional materials”, MRS Bull., 28-11, pp802806, 2003 Google Scholar
12. Angiolini, S. et al. , “High Performance Plastic Substrates for Active Matrix Flexible FPD”, Proceedings of SID 2003, 47-1, 2003 Google Scholar