Patent ID: 11948912
Assignee: INFINEON TECHNOLOGIES AG
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A substrate stack, comprising:
a first substrate having a first hybrid interface layer, the first hybrid interface layer comprising a first insulator and a first metal; and
a second substrate having a second hybrid interface layer, the second hybrid interface layer comprising a second insulator and a second metal,
wherein the first hybrid interface layer is bonded to the second hybrid interface layer by surface-activated bonding featuring first insulator to second insulator bonds and first metal to second metal bonds,
wherein the surface activated bonding comprises:
the first hybrid interface layer and the second hybrid interface layer being surface-activated to generate dangling bonds on the first hybrid interface layer and on the second hybrid interface layer; and
the surface-activated first hybrid interface layer and the surface-activated second hybrid interface layer being brought into contact, such that the dangling bonds of the first hybrid interface layer and the dangling bonds of the second hybrid interface layer to bond together to form the first insulator to second insulator bonds and/or the first metal to second metal bonds.