TiN/ZrO2/Ti/Al Metal―Insulator―Metal Capacitors With Subnanometer CET Using ALD-Deposited Zr02 for DRAM Applications
In: IEEE electron device letters, Jg. 30 (2009), Heft 3, S. 219-221
Online
academicJournal
- print, 8 ref
Zugriff:
We provide the first report of the structural and electrical properties of TiN/ZrO2/Ti/Al metal―insulator―metal capacitor structures, where the Zr02 thin film (7―8 nm) is deposited by ALD using the new zirconium precursor ZrD-04, also known as Bis(methyleyclopentadienyl) methoxymethyl. Measured capacitance―voltage (C―V) and current―voltage (I―V) characteristics are reported for premetallization rapid thermal annealing (RTP) in N2 for 60 s at 400 °C, 500 °C, or 600 °C. For the RTP at 400 °C, we find very low leakage current densities on the order of nanoamperes per square centimeter at a gate voltage of 1 V and low capacitance equivalent thickness values of ∼0.9 nm at a gate voltage of 0 V. The dielectric constant of ZrO2 is 31 ± 2 after RTP treatment at 400 °C.
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TiN/ZrO2/Ti/Al Metal―Insulator―Metal Capacitors With Subnanometer CET Using ALD-Deposited Zr02 for DRAM Applications
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Autor/in / Beteiligte Person: | MONAGHAN, S ; CHERKAOUI, K ; O'CONNOR, E ; DJARA, V ; HURLEY, P. K ; OBERBECK, L ; TOIS, E ; WILDE, L ; TEICHERT, S |
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Zeitschrift: | IEEE electron device letters, Jg. 30 (2009), Heft 3, S. 219-221 |
Veröffentlichung: | New York, NY: Institute of Electrical and Electronics Engineers, 2009 |
Medientyp: | academicJournal |
Umfang: | print, 8 ref |
ISSN: | 0741-3106 (print) |
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