Determination of TSV-induced KOZ in 3D-stacked DRAMs: Simulations and experiments

P. S. Huang*, M. Y. Tsai, C. Y. Huang, Hsiu Jao, Brady Huang, Blacksmith Wu, Y. Y. Lin, Will Liao, Joe Huang, Lawrence Huang, Steven Shih, J. P. Lin

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

This study is to numerically and experimentally investigate the effect of via-middle Cu through silicon via (TSV) on the mobility change (or related saturated current change, or drive current change) of transistors in the DRAM chip for 3D integration and further determine the keep-out zone (KOZ) in terms of key parameters such as SiO2 layer effect, zero-stress temperature, single and array vias, through and blind vias, as well as diameter and pitch of vias. From the results of this study, the zero-stress temperature has been successfully determined from experimental data. The KOZs based on the more than 10% change in carrier mobility (or 5% saturated current changes) have been identified by finite element numerical calculations associated with related piezoresistive coefficients. Numerical results of saturated current changes have been validated by good comparisons with experimental data. Based on the detailed analyses using this validated model, the key parameters affecting the KOZs will be presented and discussed in detail.

Original languageEnglish
Title of host publication2012 7th International Microsystems, Packaging, Assembly and Circuits Technology Conference, IMPACT 2012 - Proceedings
Pages52-55
Number of pages4
DOIs
StatePublished - 2012
Event2012 7th International Microsystems, Packaging, Assembly and Circuits Technology Conference, IMPACT 2012 - Taipei, Taiwan
Duration: 24 10 201226 10 2012

Publication series

NameProceedings of Technical Papers - International Microsystems, Packaging, Assembly, and Circuits Technology Conference, IMPACT
ISSN (Print)2150-5934
ISSN (Electronic)2150-5942

Conference

Conference2012 7th International Microsystems, Packaging, Assembly and Circuits Technology Conference, IMPACT 2012
Country/TerritoryTaiwan
CityTaipei
Period24/10/1226/10/12

Keywords

  • 3D IC
  • Keep-out zone
  • Mobility
  • Stress
  • Through-silicon-via

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