Sub-10 nm lateral spatial resolution in scanning capacitance microscopy achieved with solid platinum probes

被引:40
作者
Bussmann, E [1 ]
Williams, CC [1 ]
机构
[1] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA
关键词
D O I
10.1063/1.1641161
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Sub-10 nm resolution can be obtained in scanning capacitance microscopy (SCM) if the probe tip is approximately of the same size. Such resolution is observed, although infrequently, with present commercially available probes. To acquire routine sub-10 nm resolution, a solid Pt metal probe has been developed with a sub-10 nm tip radius. The probe is demonstrated by SCM imaging on a cross-sectioned 70 nm gatelength field-effect transistor (FET), a shallow implant (n(+)/p, 24 nm junction depth), and an epitaxial staircase (p, similar to75 nm steps). Sub-10 nm resolution is demonstrated on the FET device over the abrupt meeting between a silicon-on-insulator oxide layer and a neighboring Si region. Comparable resolution is observed on the implant structure, and quantitative SCM dopant profiling is performed on it with sub-10 nm accuracy. Finally, the epitaxial staircase structure is quantitatively profiled demonstrating the accuracy obtained in quantitative profiling with the tips. (C) 2004 American Institute of Physics.
引用
收藏
页码:422 / 425
页数:4
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