The Japan Society of Applied Physics

10:45 AM - 11:00 AM

[M-4-01] Thin and Locally Dislocation-Free SiGe Virtual Substrate Fabrication by Lateral Selective Epitaxy

Yuji Yamamoto1, Wei-Chen Wen1, Markus Andreas Schubert1, Agnieszka Anna Anna Corley-Wiciak1, Sho Sugawa2, Yuta Ito2, Ryo Yokogawa2, Atsushi Ogura2, Bernd Tillack1,3 (1. IHP - Leibniz-Institut für innovative Mikroelektronik (Germany), 2. School of Sci. and Tech., Meiji Univ. (Japan), 3. Technische Universität Berlin (Germany))

https://doi.org/10.7567/SSDM.2023.M-4-01

Locally dislocation-free SiGe-on-insulator is fabricated by chemical vapor deposition. Lateral selective SiGe growth of ~30, ~45 and ~55% is performed around ~1 µm square Si(001) pillar located under the center of a 6.3 µm square SiO2 on Si-on-insulator substrate. In the laterally grown SiGe, tensile strain is observed and the strain is slightly increased at the corner of the SiGe. Ge incorporation is influenced by the strain and facet orientation. These phenomena are pronounced for SiGe with higher Ge content. The dislocation-free area is formed along <010> from the Si pillar by lateral aspect-ratio-trapping.