Patent ID: 11903214
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 12:
13. A method of forming a ferroelectric random access memory (FeRAM) device, the method comprising:
forming a layer stack over a substrate, wherein the layer stack comprises alternating layers of a first dielectric material and a word line (WL) material;
forming first trenches extending vertically through the layer stack;
filling the first trenches, wherein filling the first trenches comprises forming, in the first trenches, a ferroelectric material, a channel material over the ferroelectric material, and a second dielectric material over the channel material;
after filling the first trenches, forming second trenches extending vertically through the layer stack, the second trenches being interleaved with the first trenches; and
filling the second trenches, wherein filling the second trenches comprises forming, in the second trenches, the ferroelectric material, the channel material over the ferroelectric material, and the second dielectric material over the channel material.