Patent ID: 11882693
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. The method for manufacturing a semiconductor device of claim 7, wherein the forming, by the ion-doping technique, the first isolation layer in the active region comprises:
forming a first mask layer having a first opening on the substrate;
implanting, through the first opening, oxygen ions into the active region, removing the first mask layer, and forming, by annealing, a bottom of the first isolation layer;
forming a second mask layer having a second opening on the substrate; and
implanting, through the second opening, oxygen ions into the active region, removing the second mask layer, and forming, by annealing, a sidewall of the first isolation layer, the bottom of the first isolation layer and the sidewall of the first isolation layer constituting the first isolation layer.