Patent ID: 11894319
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method comprising:
bonding a front side of a second wafer to a front side of a first wafer to form a wafer-on-wafer structure;
forming a trench through the second wafer into the first wafer;
filling the trench to form an extended seal ring; and
singulating a first package from the wafer-on-wafer structure, the first package comprising:
a first die and a second die, the a first die comprising a first seal ring surrounding a periphery thereof, the second die comprising a second seal ring surrounding a periphery thereof;
the extended seal ring spanning between the first die and the second die, the extended seal ring surrounding a contact area of the wafer-on-wafer structure and sealing the contact area within the extended seal ring; and
a contact pad disposed at an upper surface of the first package, the contact pad electrically coupled to the extended seal ring.