Patent ID: 11881480
Assignee: SEMICONDUCTOR MANUFACTURING INTERNATIONAL (SHANGHAI) CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 11:
12. The method according to claim 9, wherein a process of forming the first opening and the second opening includes:
forming a second mask layer on the stacked material structure, wherein the second mask layer exposes a portion of a surface of the sacrificial material layer;
using the second mask layer as a mask, removing a portion of the stacked material structure until a surface of the substrate is exposed, forming a first opening in the stacked material structure on the first region, and forming an initial first nanostructure and an initial second nanostructure on the first region, wherein the initial first nanostructure includes a plurality of first composite layers, a first composite layer of the plurality of first composite layers includes a first nanowire and a first sacrificial layer on the first nanowire, the initial second nanostructure includes a plurality of second composite layers, and a second composite layer of the plurality of second composite layers includes a second nanowire and a second sacrificial layer on the second nanowire; and
forming a second opening in the stacked material structure on the second region, and forming an initial third nanostructure and an initial fourth nanostructure on the second region, wherein the initial third nanostructure includes a plurality of third composite layers, a third composite layer of the plurality of third composite layers includes a third nanowire and a third sacrificial layer on the third nanowire, the initial fourth nanostructure includes a plurality of fourth composite layers, and a fourth composite layer of the plurality of fourth composite layers includes a fourth nanowire and a fourth sacrificial layer on the fourth nanowire.