AMOLED backplanes of amorphous silicon on steel foils

Alex Z. Kattamis, Noel Christopher Giebink, I. Chun Cheng, Sigurd Wagner, Yongtaek Hong, Vincent Cannella, Stephen R. Forrest

Research output: Contribution to journalConference articlepeer-review

10 Scopus citations


Thermal, dimensional, and chemical stability make stainless steel foils desirable substrates for flexible AMOLED transistor backplanes. However, the surface roughness and the conductivity of the substrates mean they may not be simple drop-in replacements for glass. We assessed techniques for surface planarization with spin-on glass and benzocyclobutene, and for electrical insulation with silicon dioxide. After the substrates were prepared, active-matrix organic light emitting display (AMOLED) backplanes using hydrogenated amorphous silicon thin-film transistors were fabricated. The backplanes consisted of (48 × 4) × 48 vertical stripe pixels of 92 μm × 369μan with aperture ratio of 48% and resolution of 70ppi. With electron mobilities of up to ∼0.5cm2/Vs the pixel circuits can deliver up to 26μA of current to an electrophosphorescent OLED.

Original languageEnglish (US)
Pages (from-to)108-111
Number of pages4
JournalSID Conference Record of the International Display Research Conference
StatePublished - Dec 1 2006
EventSID 26th International Display Research Conference - Kent, OH, United States
Duration: Sep 18 2006Sep 21 2006

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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