Investigation of amorphous IGZO TFT employing Ti/Cu source/drain and SiNx passivation

Young Wook Lee, Sung Hwan Choi, Jeong Soo Lee, Jang Yeon Kwon, Min Koo Han

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We successfully fabricated a-IGZO TFTs employing a Ti/Cu source/drain (S/D) and SiNx passivation in order to reduce the line-resistance, as compared to most oxide TFTs that use Mo (or TCO) and SiO 2 for their S/D and passivation, respectively. Although passivated with SiNx, the TFT exhibits good transfer characteristics without a negative shift. However, the TFT employing a Mo S/D exhibited conductor-like characteristics when passivated with SiNx. Our investigation suggests that the IGZO oxygen vacancies found in the Ti/Cu S/D are controlled, resulting in low concentrations, and so prevent the SiNx-passivated TFT from having a negative shift.

Original languageEnglish
Title of host publicationAmorphous and Polycrystalline Thin-Film Silicon Science and Technology - 2011
Number of pages6
Publication statusPublished - 2012
Event2011 MRS Spring Meeting - San Francisco, CA, United States
Duration: 2011 Apr 252011 Apr 29

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2011 MRS Spring Meeting
Country/TerritoryUnited States
CitySan Francisco, CA

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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