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Erschienen in:
01.01.2013
Facile sol–gel preparation of nanocrystal embedded thin film material for memory device
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 1/2013
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Abstract
A promising charge trapping film with crystal embedded material is proposed for future electronic devices. Instead of conventional high-vacuum and expensive tool, this technique adopts very cheaper process of sol–gel spin-coating for fabrication of thin film material in the charge trapping flash memory (CTFM). The crystal from spinodal phase separation is observed for sol–gel thin film at 900 °C annealing, and is strongly related to the thickness of the spin-coated thin film. The morphology of the crystal from the ethanol solvent system is in the isolated form, while from 2-propanol solvent is in the interconnected structure. The sol–gel-derived CTFM from ethanol exhibits the better memory performance of retention times for <5 and <10 % charge loss at applied temperature of 25 and 85 °C, respectively. The ethanol system CTFM demonstrates a large memory window (~10 V) and good reliability than 2-propanol (~3 V) due to the existence of several isolated crystals in silicon dioxide film.