Patent ID: 11930630
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A preparation method for a dynamic random access memory capacitor, comprising:
S1, forming a first low dielectric loss material layer;
S2, forming a high dielectric material layer on the first low dielectric loss material layer; and
S3, forming a second low dielectric loss material layer on the high dielectric material layer
wherein a thickness ratio of the high dielectric material layer to a sum of a thickness of the first low dielectric loss material layer and a thickness of the second low dielectric loss material layer is (200-100):1, the thickness of the first low dielectric loss material layer is 0.34-10 nm, and the thickness of the second low dielectric loss material layer is 0.34-10 nm.