Three-dimensional stackable ferroelectric random access memory devices and methods of forming
Abstract:
A method of forming a ferroelectric random access memory (FeRAM) device includes: forming a first layer stack and a second layer stack successively over a substrate, where the first layer stack and the second layer stack have a same layered structure that includes a layer of a first electrically conductive material over a layer of a first dielectric material, where the first layer stack extends beyond lateral extents of the second layer stack; forming a trench that extends through the first layer stack and the second layer stack; lining sidewalls and a bottom of the trench with a ferroelectric material; conformally forming a channel material in the trench over the ferroelectric material; filling the trench with a second dielectric material; forming a first opening and a second opening in the second dielectric material; and filling the first opening and the second opening with a second electrically conductive material.
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