Patent ID: 11869859
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. The three-dimensional device structure of claim 13, wherein:
the BIS comprises first metal die interconnect structures disposed in the first bonding layer and second metal die interconnect structures disposed in the second bonding layer;
the first metal die interconnect structures are fusion bonded to respective ones of the second metal die interconnect structures;
the BDP comprises first dummy metal features disposed in the first bonding layer and second dummy metal features disposed in the second bonding layer;
the first dummy metal features are fusion bonded to respective ones of the second dummy metal features; and
first metal die interconnect structures, the second metal die interconnect structures, the first dummy metal features, and the second dummy metal features comprise copper or a copper alloy.