Oxide TFT LC Oscillators on Glass and Plastic for Wireless Functions in Large-Area Flexible Electronic Systems

Yasmin Afsar, Jenny Tang, Warren Rieutort-Louis, Liechao Huang, Yingzhe Hu, Josue Sanz-Robinson, Sigurd Wagner, Naveen Verma, James C. Sturm

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


High-frequency signals have important applications in large-area hybrid systems, enabling efficient wireless transmission of power and information. We report zinc-oxide thin-film transistor (ZnO TFT) cross-coupled LC oscillator circuits on glass and 3.5-pm-thick polyimide substrates that achieve oscillation frequencies as high as 35 MHz and 17 MHz, respectively. The TFTs are designed for high unity power-gain frequency fMAX by minimizing gate resistance and device capacitances. In a resonant oscillator topology, this enables oscillation well above the cutoff frequency fT of the TFTs. Oscillators on plastic benefit from the improved dimensional stability of spin-cast ultrathin substrates, which allows TFTs on these substrates to have gate resistances and device capacitances comparable to TFTs on glass.

Original languageEnglish (US)
Pages (from-to)207-210
Number of pages4
JournalDigest of Technical Papers - SID International Symposium
Issue number1
StatePublished - 2016
Event54th Annual SID Symposium, Seminar, and Exhibition 2016, Display Week 2016 - San Francisco, United States
Duration: May 22 2016May 27 2016

All Science Journal Classification (ASJC) codes

  • General Engineering


  • Cutoff frequency (fT)
  • Flexible electronics
  • Large area electronics (LAE)
  • Oxide thin-film transistor (TFT)
  • Plasma-enhanced atomic layer deposition (PEALD)
  • TFT circuits
  • Thin-film/CMOS hybrid systems
  • Unity power gain frequency (MX)
  • Zinc oxide


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