Fabrication of suspended amorphous indium-gallium-zinc oxide thin-film transistors using bulk micromachining techniques
In this article, we propose a novel application of amorphous indium-gallium-zinc oxide (a-InGaZnO) thin films to micro electromechanical systems (MEMS). For this purpose, we investigated the residual stress in the a-InGaZnO thin films deposited by magnetron sputtering. The films with various residua...
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Published in | Japanese Journal of Applied Physics Vol. 53; no. 6; pp. 66503 - 1-066503-7 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
The Japan Society of Applied Physics
01.06.2014
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Subjects | |
Online Access | Get full text |
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Summary: | In this article, we propose a novel application of amorphous indium-gallium-zinc oxide (a-InGaZnO) thin films to micro electromechanical systems (MEMS). For this purpose, we investigated the residual stress in the a-InGaZnO thin films deposited by magnetron sputtering. The films with various residual stresses were characterized using atomic force microscopy, scanning electron microscopy, and X-ray diffraction. We found that the residual stress strongly depended on the sputtering gas pressure. In addition, we discovered a relationship between the residual stress and the microstructure in a-InGaZnO thin films. To gain more insight into the a-InGaZnO thin films with various residual stresses, we fabricated a-InGaZnO thin-film transistors (TFTs), and measured their transfer characteristics. We also fabricated a-InGaZnO TFTs on self-supported membranes, combining the typical TFT fabrication process and bulk micromachining techniques, for the application of a-InGaZnO to MEMS devices. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0021-4922 1347-4065 |
DOI: | 10.7567/JJAP.53.066503 |