Abstract Two kinds of corner effects existing in double-gate (DG) and gate-all-around (GAA) MOSFETs have been investigated by three-dimensional (3D) and two-dimensional (2D) simulations. It is found that the corner effect caused by conterminous gates, which is usually deemed to deteriorate the transistor performance, does not always play a negative role in GAA transistors. It can suppress the leakage current of transistors with low channel doping, though it will enhance the leakage current at high channel doping. The study of another kind of corner effect, which exists in the corner at the bottom of the silicon pillar of DG/GAA vertical MOSFETs, indicates that the D-top structure with drain on the top of the device pillar of vertical transistor shows great advantage due to lower leakage current and better DIBL (drain induced barrier lowering) effect immunity than the S-top structure with source on the top of the device pillar. Therefore the D-top structure is more suitable when the requirement in leakage current and short channel character is critical.
Received: 15 August 2006
Revised: 08 September 2006
Accepted manuscript online:
(Semiconductor-device characterization, design, and modeling)
Fund: Project supported by State Key Fundamental Research Project of China (Grant No 2000036501) and the National Natural Science Foundation of China (Grant No 90207004).
Cite this article:
Hou Xiao-Yu(侯晓宇), Zhou Fa-Long(周发龙), Huang Ru(黄如), and Zhang Xing(张兴) Corner effects in double-gate/gate-all-around MOSFETs 2007 Chinese Physics 16 812
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.