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Ferroelectric device film stacks with texturing layer, and method of forming such

專利號(hào)
US11659714B1
公開日期
2023-05-23
申請(qǐng)人
Kepler Computing Inc.(US CA San Francisco)
發(fā)明人
Niloy Mukherjee; Ramamoorthy Ramesh; Sasikanth Manipatruni; James Clarkson; FNU Atiquzzaman; Gabriel Antonio Paulius Velarde; Jason Y. Wu
IPC分類
H01L27/11507; H01L27/11502; H01L49/02; H01L27/11597; H01L27/11592; H01L27/11587
技術(shù)領(lǐng)域
templating,lattice,layer,or,angstroms,in,structure,constant,fe,some
地域: CA CA San Francisco

摘要

Described are ferroelectric device film stacks which include a templating or texturing layer or material deposited below a ferroelectric layer, to enable a crystal lattice of the subsequently deposited ferroelectric layer to template off this templating layer and provide a large degree of preferential orientation despite the lack of epitaxial substrates.

說明書

Example 16b: The method device of example 14b, comprising: fabricating fourth structure adjacent to the second structure, wherein the fourth structure comprises a barrier material that prevents oxygen and hydrogen diffusion, wherein the barrier material of the fourth structure includes one of: metal boride; metal carbide; metal nitride; intermetallic; or amorphous metal oxide.

Example 17b: The method of example 14b, wherein the ferroelectric material includes one of: PbxLa1-xZr or TiO3; pseudo-cubic BiFeO3 with a lattice constant of about 3.97 Angstroms; pseudo-cubic LaxBi1-xFeO3 with a lattice constant of about 3.96 Angstroms; tetragonal BaTiO3 with a lattice constant of about 4 Angstroms; Relaxor ferroelectrics including lead magnesium niobite-lead titanate (PMN-PT); or Ferroelectric Hf0.5Zr0.5O2 (HZO); wherein the second structure or the third structure includes one of: orthorhombic SrRuO3 with a lattice constant of about 3.93 Angstroms; SrRuO4; La0.5Sr0.5CoO3; or La0.7Mn0.3CoO3.

Example 18b: The method of example 14b, wherein the third structure includes an intermetallic material, and wherein the intermetallic material includes one of: Ni3Al, NiAl3, Ti3Al, or TiAl3.

權(quán)利要求

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