Direct Observation of Dielectric Breakdown at Step-Bunching on 4H-SiC

2015 ◽  
Vol 821-823 ◽  
pp. 468-471 ◽  
Author(s):  
Yuki Mori ◽  
Mieko Matsumura ◽  
Hirotaka Hamamura ◽  
Toshiyuki Mine ◽  
Akio Shima ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Surface Morphology ◽  
Dielectric Breakdown ◽  
Optical Emission ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Tem Analysis ◽  
Mos Capacitor ◽  
Step Bunching ◽  
Electrical Stress

The mechanism of dielectric breakdown of oxide on step-bunching of 4H-silicon carbide (SiC) was investigated. Comparing the surface morphology obtained before forming metal-oxide-semiconductor (MOS) capacitor and optical emission on the capacitor under electrical stress, it was cleared that current concentrates on step-bunching and it often caused preferential dielectric breakdown. Based on TEM analysis and the observation of time dependence of emission under the stress, a new model was proposed to explain the dielectric breakdown on step-bunching.

Step-Bunching Dependence of the Lifetime of MOS Capacitor on 4o Off-Axis Si-Face 4H-SiC Epitaxial Wafers

2014 ◽  
Vol 778-780 ◽  
pp. 611-614 ◽  
Author(s):  
Akira Bandoh ◽  
Kenji Suzuki ◽  
Yoshihiko Miyasaka ◽  
Hiroshi Osawa ◽  
Takayuki Sato
Keyword(s):  
Epitaxial Growth ◽  
Dielectric Breakdown ◽  
Metal Oxide Semiconductor ◽  
Time Dependent ◽  
Oxide Semiconductor ◽  
Mos Capacitor ◽  
Step Bunching ◽  
Time Dependent Dielectric Breakdown ◽  
Substrate Properties ◽  
Reduced Time

The step-bunching dependence of the lifetime of metal–oxide–semiconductor capacitors on 4° off-axis 4H-SiC epitaxial wafers was investigated. The effects of the C/Si ratios in epitaxial growth and the substrate properties were examined. Step-bunching was observed at the base of triangle or trapezoid defects. Step-bunching decreased as the C/Si ratio was reduced. Time-dependent dielectric breakdown (TDDB) measurements showed that the locations of short lifetime breakdowns closely matched step-bunching positions. TDDB measurements of four different commercial substrates showed clear differences in capacitor lifetime.

Influence of Epi-Layer Growth Pits on SiC Device Characteristics

2015 ◽  
Vol 821-823 ◽  
pp. 177-180 ◽  
Author(s):  
Chiaki Kudou ◽  
Hirokuni Asamizu ◽  
Kentaro Tamura ◽  
Johji Nishio ◽  
Keiko Masumoto ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Schottky Barrier ◽  
Leakage Current ◽  
Dielectric Breakdown ◽  
Layer Growth ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Constant Current ◽  
Schottky Barrier Diodes ◽  
Current Time

Homoepitaxial layers with different growth pit density were grown on 4H-SiC Si-face substrates by changing C/Si ratio, and the influence of the growth pit density on Schottky barrier diodes and metal-oxide-semiconductor capacitors were investigated. Even though there were many growth pits on the epi-layer, growth pit density did not affect the leakage current of Schottky barrier diodes and lifetime of constant current time dependent dielectric breakdown. By analyzing the growth pit shape, the aspect ratio of the growth pit was considered to be the key factor to the leakage current of the Schottky barrier diodes and the lifetime of metal-oxide-semiconductor capacitors.

Reliability of metal-oxide-semiconductor capacitors on 6H-silicon carbide

1999 ◽  
Vol 48 (1-4) ◽  
pp. 253-256
Author(s):  
M. Treu ◽  
R. Schörner ◽  
P. Friedrichs ◽  
R. Rupp ◽  
A. Wiedenhofer ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Metal Oxide ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor

Effects of thermal and electrical stress on defect generation in InAs metal–oxide–semiconductor capacitor

2019 ◽  
Vol 467-468 ◽  
pp. 1161-1169 ◽  
Author(s):  
Min Baik ◽  
Hang-Kyu Kang ◽  
Yu-Seon Kang ◽  
Kwang-Sik Jeong ◽  
Changmin Lee ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Defect Generation ◽  
Electrical Stress ◽  
Metal Oxide Semiconductor Capacitor

High-temperature modeling and characterization of 6H silicon carbide metal-oxide-semiconductor field-effect transistors

2005 ◽  
Vol 97 (4) ◽  
pp. 046106 ◽  
Author(s):  
Stephen K. Powell ◽  
Neil Goldsman ◽  
Aivars Lelis ◽  
James M. McGarrity ◽  
Flynn B. McLean
Keyword(s):  
Silicon Carbide ◽  
High Temperature ◽  
Metal Oxide ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Temperature Modeling
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