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

Claim 19:
20. A method for dicing a bonded structure, comprising:
thinning a top surface and a bottom surface of a bonded structure, the bonded structure having a first wafer and a second wafer bonded with a bonding interface;
forming a series of ablation structures in the first wafer and the second wafer, the series of ablation structures between a first part and a second part of the bonded structure; and
separating the first part and the second part of the bonded structure along the series of ablation structures, comprising performing one of:
separating, along a first ablation spot and a second ablation spot vertically aligned with the first ablation spot, the first part and the second part that comprises a first device portion located in the first wafer and a second device portion located in the second wafer and bonded with the first device portion by the bonding interface, the first device portion comprising one of a memory array and a peripheral circuit, and the second device portion comprising another one of the memory array and the peripheral circuit, and the one of the memory array and the peripheral circuit and the other one of the memory array and the peripheral circuit being bonded by the bonding interface; and
separating the first part and the second part along a vertical ablation stripe, the vertical ablation stripe penetrating the bonding interface and extending from the first wafer to the second wafer.