Patent ID: 11860555
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The method according to claim 1, further comprising:
acquiring the exposure parameters of the first wafer and the alignment mark count of the second wafer which correspond to a historical first buffer time when the historical first buffer time is less than or equal to the preset value, wherein the historical first buffer time is a difference value between a historical first time and a historical second time, the historical first time is a time at which the exposure machine performs historical exposure of the first wafer, and the historical second time is a time at which the exposure machine performs historical alignment of the second wafer; and
acquiring the corresponding relationship according to a plurality of exposure parameters of the first wafer and a plurality of alignment mark counts of the second wafer.