Intermixing between HfO2 and GeO2 films deposited on Ge(001) and Si(001) : role of the substrate
Thermally driven atomic transport in HfO2 /GeO2/substrate structures on Ge 001 and Si 001 was investigated in N2 ambient as function of annealing temperature and time. As-deposited stacks showed no detectable intermixing and no instabilities were observed on Si. On Ge, loss of O and Ge was detected...
| Authors: | , , , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2011 |
| Country: | Brasil |
| Institution: | Universidade Federal do Rio Grande do Sul (UFRGS) |
| Repository: | Repositório Institucional da UFRGS |
| Language: | English |
| OAI Identifier: | oai:www.lume.ufrgs.br:10183/141673 |
| Online Access: | http://hdl.handle.net/10183/141673 |
| Access Level: | Open access |
| Keyword: | Plasma CVD Semicondutores elementares Silício Compostos de háfnio Germânio Crescimento de semicondutores |
| Summary: | Thermally driven atomic transport in HfO2 /GeO2/substrate structures on Ge 001 and Si 001 was investigated in N2 ambient as function of annealing temperature and time. As-deposited stacks showed no detectable intermixing and no instabilities were observed on Si. On Ge, loss of O and Ge was detected in all annealed samples, presumably due to evolution of GeO from the GeO2 /Ge interface. In addition, hafnium germanate is formed at 600 °C. Our data indicate that at 500 °C and above HfO2 /GeO2 stacks are stable only if isolated from the Ge substrate. |
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