Patent ID: 11935797
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A test method for an alignment error, comprising:
providing a substrate, wherein a first conductive layer and a second conductive layer are arranged on the substrate and spaced apart from each other at a predetermined interval in a first direction, and the first direction is parallel to a plane where the substrate is located;
acquiring a first distance, wherein the first distance is a distance between a central axis of the first conductive layer in a direction perpendicular to the first direction and a central axis of the second conductive layer in a direction perpendicular to the first direction;
acquiring a first resistance of the first conductive layer and a second resistance of the second conductive layer;
acquiring an actual distance between the first conductive layer and the second conductive layer according to the first distance, the first resistance, and the second resistance; and
acquiring a value of the alignment error between the first conductive layer and the second conductive layer based on the actual distance and a standard distance between the first conductive layer and the second conductive layer.