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Formation and Schottky barrier height of metal contacts to &bgr;‐SiC

 

作者: J. R. Waldrop,   R. W. Grant,  

 

期刊: Applied Physics Letters  (AIP Available online 1990)
卷期: Volume 56, issue 6  

页码: 557-559

 

ISSN:0003-6951

 

年代: 1990

 

DOI:10.1063/1.102744

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Formation of Schottky barrier contacts ton‐type &bgr;‐SiC(100) was systematically investigated for several metals with various physical and chemical properties. The metals (Pd, Au, Co, Ti, Ag, Tb, and Al) were deposited onto oxygen terminated (∼1 monolayer) surfaces. Metal/&bgr;‐SiC interface chemistry and Schottky barrier height &fgr;Bduring contact formation were obtained by x‐ray photoemission spectroscopy; the corresponding electrical properties of thick contacts were characterized by capacitance‐voltage and current‐voltage methods. The metal/&bgr;‐SiC interface is unreactive at room temperature. X‐ray photoemission spectroscopy and electrical measurements demonstrate that these metal contacts exhibit a wide range of &fgr;B, 0.95–0.16 eV; within this range an individual contact &fgr;Bvalue depends strongly on the metal work function in general accord with the Schottky–Mott limit.

 

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