Patent ID: 11929335
Assignee: WINBOND ELECTRONICS CORP.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A bonded semiconductor structure, comprising:
a first device wafer, comprising:
a first substrate;
a first bonding dielectric layer disposed on the first substrate; and
a first bonding pad disposed in the first bonding dielectric layer and having a first top surface recessed from a surface of the first bonding dielectric layer, wherein a first bottom angle between a first bottom surface and a first sidewall of the first bonding pad is smaller than 90 degrees; and

a second device wafer, comprising:
a second substrate;
a second bonding dielectric layer disposed on the second substrate and bonded to the first bonding dielectric layer; and
a second bonding pad disposed in the second bonding dielectric layer and having a second top surface protruding from a surface of the second bonding dielectric layer and bonded to the first top surface of the first bonding pad.