Patent ID: 11916038
Assignee: TOHOKU UNIVERSITY
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B  C | IPC C  H

Claim 31:
32. A hybrid bonding method for electronic devices, comprising forming a bonding surface that is at least partially smooth and has an electrode portion and an insulating portion on each of the two electronic devices to be bonded, and bonding the two bonding surfaces by aligning the electrode portions and the insulating portions with each other,
the bonding between the two bonding surface comprising:
a step of forming a bonding film on each of the two bonding surfaces, which is a thin film of a metal or semiconductor formed by vacuum deposition and oxidized at least on its surface,
a step of exposing the surfaces of the bonding films formed on the two bonding surfaces to a space having moisture to hydrophilize the surfaces of the bonding films, and
a step of overlaying the two bonding surfaces with each other and bonding them together so that the surfaces of the bonding films in a hydrophilic state contacting each other with the electrode portions and the insulating portions of the two bonding surfaces aligned with each other,
the bonding through the bonding films providing continuity between the electrode portions of the two bonding surfaces and making the insulating portions electrically insulated.