Refinement of unified random access memory

  • Seong Wan Ryu
  • , Jin Woo Han
  • , Chung Jin Kim
  • , Sung Jin Choi
  • , Sungho Kim
  • , Jin Soo Kim
  • , Kwang Hee Kim
  • , Jae Sub Oh
  • , Meyong Ho Song
  • , Gi Sung Lee
  • , Yu Chang Park
  • , Jeoung Woo Kim
  • , Yang Kyu Choi

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

This paper investigates how gate height Hg, which refers to the size of a floating-body, affects the program efficiency and retention characteristics of one-transistor DRAM (1T-DRAM) and nonvolatile memory (NVM) for a FinFET SONOS device that has a partially depleted silicon-on-insulator (PDSOI) region as a charge storage node for a 1T-DRAM operation. A device with a lower Hg yields enhanced program efficiency due to the higher impact ionization rate caused by the enlarged PDSOI region for both 1T-DRAM and NVM operations. The device with the lower Hg shows slightly poor retention characteristics in the NVM unlike the 1T-DRAM.

Original languageEnglish
Pages (from-to)601-608
Number of pages8
JournalIEEE Transactions on Electron Devices
Volume56
Issue number4
DOIs
StatePublished - 2009

Keywords

  • FinFET
  • Gate height
  • Nonvolatile memory
  • One-transistor DRAM (1T-DRAM)
  • Partially depleted silicon-on-insulator (PDSOI)
  • SONOS
  • Unified random access memory (URAM)

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