ALD Deposition: The dielectric stack is deposited using a sequential in situ ALD process. Various precursors are used, including TEMAHf (Tetrakis(ethylmethylamino)hafnium), TEMAZr (Tetrakis(ethylmethylamino)zirconium), TMA (Trimethylaluminum), and H2O (water) as the precursors for Hf, Zr, Al, and O, respectively.