Development of HfO2-Based Ferroelectric Memories for Future CMOS Technology Nodes
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Development of HfO2-Based Ferroelectric Memories for Future CMOS Technology Nodes

Development of HfO2-Based Ferroelectric Memories for Future CMOS Technology Nodes


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About the Book

This thesis evaluates the viability of ferroelectric Si: HfO2 and its derived FeFET application for non-volatile data storage. At the beginning, the ferroelectric effect is explained briefly such that the applications that make use of it can be understood. Afterwards, the latest findings on ferroelectric HfO2 are reviewed and their potential impact on future applications is discussed. Experimental data is presented afterwards focusing on the ferroelectric material characteristics of Si: HfO2 that are most relevant for memory applications. Besides others, the stability of the ferroelectric switching effect could be demonstrated in a temperature range of almost 400 K. Moreover, nanosecond switching speed and endurance in the range of 1 million to 10 billion cycles could be proven. Retention and imprint characteristics have furthermore been analyzed and are shown to be stable for 1000 hours bake time at 125 °C. Derived from the ferroelectric effect in HfO2, a 28 nm FeFET memory cell is introduced as the central application of this thesis. Based on numerical simulations, the memory concept is explained and possible routes towards an optimized FeFET cell are discussed. Subsequently, the results from electrical characterization of FeFET multi-structures are presented and discussed. By using Si: HfO2 it was possible to realize the world's first 28 nm FeFET devices possessing i.a. 10k cycling endurance and an extrapolated 10 year data retention at room temperature. The next step towards a FeFET memory is represented by connecting several memory cells into matrix-type configurations. A cell concept study illustrates the different ways in which FeFET cells can be combined together to give high density memory arrays. For the proposed architectures, operational schemes are theoretically discussed and analyzed by both electrical characterization of FeFET multi-structures and numerical simulations. The thesis concludes with the electrical characterization of small FeFET memory arra
About the Author: Stefan Ferdinand Müller received the joint master's degree in Microelectronics from the Technical University Munich, Germany, and Nanyang Technological University Singapore in 2011. He also holds a diploma degree in Mechatronics and Information Technology as well as a bachelor's degree in Mechanical Engineering both from Technical University Munich, Germany (2011/2008). In 2011, he joined NaMLab gGmbH, Dresden, Germany, as a PhD student working on ferroelectric devices. Since 2015 he is project leader of the publicly funded research transfer project "EXIST Forschungstransfer" aiming at the commercialization of ferroelectric hafnium oxide.


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Product Details
  • ISBN-13: 9783739248943
  • Publisher: Books on Demand
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Spine Width: 8 mm
  • Width: 148 mm
  • ISBN-10: 3739248947
  • Publisher Date: 08 Apr 2016
  • Height: 210 mm
  • No of Pages: 138
  • Series Title: English
  • Weight: 222 gr


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Development of HfO2-Based Ferroelectric Memories for Future CMOS Technology Nodes
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