Patent ID: 11869843
Assignee: KEPLER COMPUTING INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 1:
2. The method of claim 1, wherein depositing the material layer stack comprises depositing at least two layers comprising the ferroelectric material, wherein the ferroelectric material comprises one of:
bismuth ferrite (BFO), with a first doping material, where in the first doping material is one of lanthanum or elements from lanthanide series of periodic table;
lead zirconium titanate (PZT) or PZT with a second doping material, wherein the second doping material is one of La or Nb;
a relaxor ferroelectric material which includes one of lead magnesium niobate (PMN), lead magnesium niobate-lead titanate (PMN-PT), lead lanthanum zirconate titanate (PLZT), lead scandium niobate (PSN), barium titanium-bismuth zinc niobium tantalum (BT-BZNT), or Barium titanium-barium strontium titanium (BT-BST);
a perovskite material which includes one of: BaTiO3, PbTiO3, KNbO3, or NaTaO3;
a first hexagonal ferroelectric which includes one of: YMnO3, or LuFeO3;
a second hexagonal ferroelectric of a type h-RMnO3, where R is a rare earth element which includes one of: cerium (Ce), dysprosium (Dy), erbium (Er), europium (Eu), gadolinium (Gd), holmium (Ho), lanthanum (La), lutetium (Lu), neodymium (Nd), praseodymium (Pr), promethium (Pm), samarium (Sm), scandium (Sc), terbium (Tb), thulium (Tm), ytterbium (Yb), or yttrium (Y); or
Hafnium (Hf), Zirconium (Zr), Aluminum (Al), Silicon (Si), their oxides or their alloyed oxides;
Hafnium oxides as Hf(1-x)ExOy, where E includes one of Al, Ca, Ce, Dy, Er, Gd, Ge, La, Sc, Si, Sr, Sn, Zr, or Y, wherein x and y are first fractions;
Al(1-x)Sc(x)N, Ga(1-x)Sc(x)N, Al(1-x)Y(x)A or Al(1-x-y)Mg(x)Nb(y)N, wherein ‘x’ and ‘y’ are second fractions;
niobate type compounds LiNbO3, LiTaO3, lithium iron tantalum oxy fluoride, barium strontium niobate, sodium barium niobate, or potassium strontium niobate; or an improper ferroelectric material which includes one of: [PTO/STO]n or [LAO/STO]n, where ‘n’ is between 1 and 100;
wherein the paraelectric material comprises: SrTiO3, Ba(x)Sr(y)TiO3, HfZrO2, Hf-Si-O, or La-substituted PbTiO3.