Patent ID: 11938562
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H | IPC B

Claim 11:
12. The method of claim 1, wherein forming the series of ablation structures in the first wafer and the second wafer comprises performing one of:
controlling a laser beam to converge on a first focal plane and a second focal plane that are determined according to a location of the bonding interface to form the first ablation spot and the second ablation spot vertically aligned with the first ablation spot, the first focal plane being arranged in the first wafer, and the second focal plane being arranged in the second wafer; and
controlling the laser beam to converge on the bonding interface to form the vertical ablation stripe across the bonding interface and extending in the first wafer and the second wafer.