Patent ID: 11877432
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A capacitor structure, disposed on a substrate, and comprising:
a columnar bottom electrode, comprising a conductive pillar and a plurality of first gears, each of the plurality of first gears being connected with an outer side surface of the conductive pillar and being perpendicular to a side surface of the conductive pillar, and the plurality of first gears being sequentially arranged along an axial direction of the conductive pillar;
an annular top electrode, comprising an annular main body and a plurality of second gears, each of the plurality of second gears penetrating through the annular main body along a direction perpendicular to an axial direction of the annular main body, the plurality of second gears being sequentially arranged along the axial direction of the annular main body, the annular main body surrounding the columnar bottom electrode, and the plurality of first gears and the plurality of second gears being alternatively arranged; and
a dielectric layer, disposed between the columnar bottom electrode and the annular top electrode.