Patent ID: 11935854
Assignee: WINBOND ELECTRONICS CORP.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for forming a bonded semiconductor structure, comprising:
providing a first device wafer and a second device wafer, wherein the first device wafer includes a first bonding layer and a first bonding pad exposed from the first bonding layer, the second device wafer includes a second bonding layer and a second bonding pad exposed from the second bonding layer;
removing a portion of the first bonding pad until exposing a sidewall of the first bonding layer, wherein an angle between the sidewall of the first bonding layer and a top surface of the first bonding pad is larger than 90 degrees;
removing a portion of the second bonding layer to expose a sidewall of the second bonding pad; and
bonding the first device wafer and the second device wafer to form a dielectric bonding interface between the first bonding layer and the second bonding layer and a conductive bonding interface between the first bonding pad and the second bonding pad, wherein the conductive bonding interface and the dielectric bonding interface comprise a step-height.