Patent ID: 11929280
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for forming a contact window structure of a semiconductor device, comprising:
providing a substrate, provided with at least one target layer formed in the substrate and exposing a surface of the target layer;
forming at least one etching spacer on the surface of the target layer;
forming a dielectric layer covering the substrate, the target layer and the etching spacer;
etching the dielectric layer to form an etching hole in the dielectric layer, a bottom of the etching hole exposing a top surface of the etching spacer; and
removing the etching spacer along the etching hole to form an etching channel communicating with the etching hole, the etching channel exposing a portion of the surface of the target layer and constituting the contact window structure with the etching hole.