Patent ID: 11935917
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A semiconductor structure, comprising:
a substrate, the substrate at least comprising a conducting layer;
a bottom supporting layer, located at a top surface of the substrate;
a stacking structure, located on a top surface of the bottom supporting layer, the stacking structure comprising a sacrificial layer and a supporting portion that are sequentially stacked and formed;
a through hole, located in the stacking structure and exposing the conducting layer;
a lower electrode, located on a sidewall of the through hole and electrically connected with the conducting layer; and
a protective layer, located between the lower electrode and the supporting portion,
wherein the stacking structure comprises a first stacking structure and a second stacking structure;
the first stacking structure is on the top surface of the bottom supporting layer, and the first stacking structure comprises a first sacrificial layer and a middle supporting portion that are sequentially formed, wherein the middle supporting portion comprises: a first supporting layer, a buffer layer, and a second supporting layer, the first supporting layer and the second supporting layer are on surfaces of two opposing sides of the buffer layer, the first supporting layer is proximal to the substrate, and surfaces, distal from the buffer layer, of the first supporting layer and the second supporting layer are connected with the sacrificial layer;
the second stacking structure is on a top surface of the first stacking structure, and the second stacking structure comprises a second sacrificial layer and a top-layer supporting portion that are sequentially formed; and
the protective layer is between the lower electrode and the middle supporting portion; wherein
materials for the second supporting layer and the first supporting layer comprise silicon carbonitride;
a carbon content of the first supporting layer is greater than a carbon content of the second supporting layer; and
a material for the buffer layer comprises silicon nitride.