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

Claim 8:
9. The method according to claim 8, wherein a process of forming the first isolation structure and the second isolation structure includes:
forming a stacked material structure on the substrate, wherein the stacked material structure includes a stack of a plurality of nanowire material layers and a sacrificial material layer on a nanowire material layer of the plurality of nanowire material layers;
forming a first opening in the stacked material structure on the first region, and forming a second opening in the stacked material structure on the second region;
forming a first isolation structure in the first opening, and forming an initial isolation structure in the second opening; and
removing a portion of the initial isolation structure on the second region, and forming a second isolation structure on the second region.