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725544

Sigma-Aldrich

Tetrakis(ethylmethylamido)hafnium(IV)

packaged for use in deposition systems

Sinonimo/i:

TEMAH, Tetrakis(ethylmethylamino)hafnium(IV)

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About This Item

Formula condensata:
[(CH3)(C2H5)N]4Hf
Numero CAS:
352535-01-4
Peso molecolare:
410.90
Numero MDL:
MFCD03427130
Codice UNSPSC:
12352300
ID PubChem:
329764168
NACRES:
NA.23

Livello qualitativo

100

Forma fisica

liquid

Impiego in reazioni chimiche

core: hafnium
reagent type: catalyst

P. eboll.

78 °C/0.01 mmHg (lit.)

Punto di fusione

<-50 °C

Densità

1.324 g/mL at 25 °C (lit.)

Temperatura di conservazione

2-8°C

Stringa SMILE

CCN(C)[Hf](N(C)CC)(N(C)CC)N(C)CC

InChI

1S/4C3H8N.Hf/c4*1-3-4-2;/h4*3H2,1-2H3;/q4*-1;+4
NPEOKFBCHNGLJD-UHFFFAOYSA-N

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Descrizione generale

Tetrakis(ethylmethylamido)hafnium(IV) (TEMAH) is a colorlessliquid, which freezes at -50 °C and boils around 78 °C at 0.1 Torr. It is air-and water-sensitive.

Applicazioni

Precursors Packaged for Depositions Systems
TEMAH is used as a precursor for atomic layer deposition(ALD) of conformal thin films of hafnium oxide (HfO2) and hafnium zirconium oxide (Hf1-xZrxO2), which are used as dielectric films in semiconductor fabrication because of their high dielectric constants.

TEMAH is well-suited for ALD because its adsorption is self-limiting on a number of substrates including glass, indium-tin oxide(ITO), Si(100), and two-dimensional materials like MoS2. TEMAH also conveniently reacts with either water or ozone as the oxygen-source in the ALD process.

Caratteristiche e vantaggi

This TEMAH is packaged in a Swagelok stainless-steeldeposition system convenient for connecting to ALD systems.

  • Steel cylinder connected to 316 stainless steelball-valve
  • 1/4 inch male Swagelok VCR connections

Avvertenze

Danger

Indicazioni di pericolo

H225 - H260 - H302 - H314 - H335

Classi di pericolo

Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 2 - Skin Corr. 1B - STOT SE 3 - Water-react 1

Organi bersaglio

Respiratory system

Rischi supp

EUH014

Codice della classe di stoccaggio

4.3 - Hazardous materials, which set free flammable gases upon contact with water

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

51.8 °F - closed cup

Punto d’infiammabilità (°C)

11 °C - closed cup

Certificati d'analisi (COA)

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Martin Rose et al.
ACS applied materials & interfaces, 2(2), 347-350 (2010-04-02)
The mechanisms of technologically important atomic layer deposition (ALD) processes, trimethylaluminium (TMA)/ozone and tetrakis(ethylmethylamino)hafnium (TEMAH)/ozone, for the growth of Al(2)O(3) and HfO(2) thin films are studied in situ by a quadrupole mass spectrometer coupled with a 300 mm ALD reactor.
Luqi Tu et al.
Nature communications, 11(1), 101-101 (2020-01-05)
Sensitive photodetection is crucial for modern optoelectronic technology. Two-dimensional molybdenum disulfide (MoS2) with unique crystal structure, and extraordinary electrical and optical properties is a promising candidate for ultrasensitive photodetection. Previously reported methods to improve the performance of MoS2 photodetectors have focused
Jaehyun Yang et al.
ACS applied materials & interfaces, 5(11), 4739-4744 (2013-05-21)
We report on the effect of oxygen plasma treatment of two-dimensional multilayer MoS2 crystals on the subsequent growth of Al2O3 and HfO2 films, which were formed by atomic layer deposition (ALD) using trimethylaluminum and tetrakis-(ethylmethylamino)hafnium metal precursors, respectively, with water

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