Three-dimensional mechanical stress analysis of trench isolation along {111} gliding planes

S. Matsuda*, C. Yoshino, H. Nakajima, K. Inou, S. Yoshitomi, Y. Katsumata, H. Iwai

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations


Three dimensional mechanical stress simulation has been applied to the trench isolation structure for bipolar LSIs. The accuracy of the simulation was confirmed by the micro Raman measurements of the actual trench structure. Considering the three dimensional analysis of the dislocation formation in the silicon crystal, there are 4 different {111} gliding planes at each point, and 3 specific gliding 〈110〉 directions for each {111} plane along which the dislocation of silicon occurs. Thus 12 gilding directions exist at each point. Resolved shear stresses along the 12 directions have been calculated by the simulation. The simulated results basically agree with the results of dislocation formation in the experiment. This method is a very useful tool to analyze the dislocation or defect formation along {111} gliding planes of the trench isolation structure.

Original languageEnglish
Pages (from-to)885-888
Number of pages4
JournalTechnical Digest - International Electron Devices Meeting
StatePublished - 1994
EventProceedings of the 1994 IEEE International Electron Devices Meeting - San Francisco, CA, USA
Duration: 11 Dec 199414 Dec 1994

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