Contact etch stop a-Si<sub>x</sub>N<sub>y</sub>:H layer: A key factor for single polysilicon flash memory data retention - CMNE
Article Dans Une Revue Journal of Vacuum Science and Technology Année : 2009

Contact etch stop a-SixNy:H layer: A key factor for single polysilicon flash memory data retention

Résumé

The silicon nitride (a-SixNy:H) contact etch stop layer strongly affects data retention performances in single polysilicon nonvolatile memories by acting on the initial charge loss phenomenon. Its improvement has required an analysis of influent plasma enhanced chemical vapor deposition process parameters through a design of experiment approach. The a-SixNy:H physico-electrical analysis points out that silicon rich compositions especially of its interfacial layer must be avoided to reduce a-SixNy:H charge amount and as a result to improve the data retention. Indeed, the a-SixNy:H being near the floating gate, its charges modulation could act as a parasitic memory screening charges stored in the floating gate by capacitive effects.
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Dates et versions

hal-00596103 , version 1 (02-05-2023)

Identifiants

Citer

G. Beylier, D. Benoit, P. Mora, S. Bruyère, G. Ghibaudo. Contact etch stop a-SixNy:H layer: A key factor for single polysilicon flash memory data retention. Journal of Vacuum Science and Technology, 2009, 27 (1), pp.486-489. ⟨10.1116/1.3071846⟩. ⟨hal-00596103⟩
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