Patent ID: 11862495
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. A measuring apparatus, comprising:
a first carrying structure for carrying and fixing a product wafer, the product wafer having alignment marks and product measuring sites corresponding respectively to the alignment marks;
a second carrying structure for carrying a monitor wafer, a projection of the monitor wafer located on the second carrying structure, in a vertical direction, being aligned with and coinciding with the product wafer located on the first carrying structure, wherein the monitor wafer has a plurality of measuring sites to be measured thereon, the product measuring sites are in one-to-one correspondence with the plurality of measuring sites to be measured; and
a measuring module for measuring the monitor wafer after the product measuring sites are determined according to the alignment marks;
wherein the measuring module comprises a first measuring unit, and the first measuring unit is configured for judging whether a target alignment mark is aligned with a predetermined position; and when the target alignment mark is aligned with the predetermined position, measuring a target measuring site to be measured, and when the target alignment mark is not aligned with the predetermined position, moving the product wafer and the monitor wafer synchronously;
wherein the predetermined position is a detection position of the first measuring unit, the target alignment mark is an alignment mark corresponding to a target standard measuring site, the target standard measuring site is a standard measuring site corresponding to the target measuring site to be measured, and the target measuring site to be measured is a measuring site to be measured selected by a user.