Patent ID: 11862281
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 9:
10. A method for preparing the word line lead-out structure, comprising:
providing a first groove in a substrate;
forming a word line extending along an X-axis direction in the first groove, a top surface of the word line being lower than a top surface of the substrate;
forming a contact hole layer on the word line and the substrate;
forming a metal layer on the contact hole layer; and
etching the metal layer and the contact hole layer to form a word line lead-out structure, comprising:
the word line, extending along the X-axis direction;
a contact hole, covering the word line along a Y-axis direction, the X-axis direction being perpendicular to the Y-axis direction; and
a metal line, covering the contact hole, the contact hole being located between the word line and the metal line and being contacted with the word line and the metal line,
wherein a contact area between the contact hole and the metal line is larger than a contact area between the contact hole and the word line.