Abstract
Metal induced strain in the channel region of silicon (Si) fin-field effect transistor (FinFET) devices has been characterized using Raman spectroscopy. The strain originates from the difference in thermal expansion coefficient of Si and titanium-nitride. The Raman map of the device region is used to determine strain in the channel after preparing the device with the focused ion beam milling. Using the Raman peak shift relative to that of relaxed Si, compressive strain values up to – 0.88% have been obtained for a 5 nm wide silicon fin. The strain is found to increase with reducing fin width though it scales less than previously reported results from holographic interferometry. In addition, finite-element method (FEM) simulations have been utilized to analyze the amount of strain generated after thermal processing. It is shown that obtained FEM simulated strain values are in good agreement with the calculated strain values obtained from Raman spectroscopy
Original language | English |
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Pages (from-to) | 57-61 |
Number of pages | 5 |
Journal | Thin solid films |
Volume | 541 |
DOIs | |
Publication status | Published - 31 Aug 2013 |
Event | E-MRS Spring Meeting 2012 - Strasbourg, France Duration: 14 May 2012 → 18 May 2012 |
Keywords
- FEM
- Silicon
- Raman spectroscopy
- Strain
- FinFET
- EWI-23025
- METIS-297600
- IR-87018
- TiN