Patent ID: 11894419
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A double-sided capacitor, comprising:
a substrate, having a capacitor contact pad on its surface;
a top supporting layer and a middle supporting layer, each of which is provided with a number of capacitor pores, and on a plane parallel to the substrate, a projection area of the middle supporting layer is greater than that of the top supporting layer, wherein the middle supporting layer is opened only at the capacitor pores, and a projection of the capacitor pores on the substrate overlaps with the capacitor contact pad;
a first electrode layer, being of a shape of a hollow column with an opening in the top, wherein the first electrode layer is perpendicular to the surface of the substrate and penetrates the top supporting layer and the middle supporting layer through the capacitor pores, wherein the bottom of the first electrode layer is in contact with the capacitor contact pad;
a dielectric layer, covering the surfaces of the first electrode layer, the top supporting layer and the middle supporting layer; and
a second electrode layer, covering the surface of the dielectric layer.