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Lateral dopant profiling with 200 nm resolution by scanning capacitance microscopy

 

作者: C. C. Williams,   J. Slinkman,   W. P. Hough,   H. K. Wickramasinghe,  

 

期刊: Applied Physics Letters  (AIP Available online 1989)
卷期: Volume 55, issue 16  

页码: 1662-1664

 

ISSN:0003-6951

 

年代: 1989

 

DOI:10.1063/1.102312

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Measurement of dopant density in silicon with lateral resolution on the 200 nm scale has been demonstrated with a near‐field capacitance technique. The technique is based upon the measurement of local capacitance between a 100 nm tip and a semiconducting surface. Lateral dopant imaging is achieved by the measurement of the voltage‐dependent capacitance between tip and sample due to the depletion of carriers in the semiconductor, as the tip is scanned laterally over the surface. Measurements of dopant density have been demonstrated over a dopant range of 1015–1020cm−3. Capacitance‐voltage measurements have been made on a submicrometer scale.

 

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