High electron mobility polycrystalline silicon thin-film transistors on steel foil substrates

Ming Wu, Kiran Pangal, J. C. Sturm, Sigurd Wagner

Research output: Contribution to journalArticle

66 Scopus citations

Abstract

Thin-film transistors have been fabricated in polycrystalline silicon films on steel foil. The polycrystalline silicon films were formed by the crystallization of hydrogenated amorphous silicon, which had been deposited on 200-μm-thick foils of stainless steel coated with ∼0.5-μm-thick layers of SiO2. We employed crystallization temperatures (and duration) of 600°C (6 h), 650°C (1 h), and 700°C (10 min). Top-gate transistors made from films crystallized at 650°C have an average electron field-effect mobility of 64 cm2/V s, with equal values in the linear and saturated regimes. Thus steel substrates permit a substantial reduction in crystallization time over glass substrates, and afford polysilicon with high electron mobility.

Original languageEnglish (US)
Pages (from-to)2244-2246
Number of pages3
JournalApplied Physics Letters
Volume75
Issue number15
DOIs
StatePublished - Oct 11 1999

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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