Patent ID: 11973045
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor structure, comprising:
a first substrate, a first opening being provided on a surface of the first substrate; and
a first bonding structure, positioned in the first opening, wherein the first bonding structure comprises a first metal layer and a second metal layer with a melting point lower than that of the first metal layer, the first metal layer comprises a first surface in contact with a bottom surface of the first opening and a second surface opposite to the first surface, the second surface is provided with a first groove, an area, not occupied by the first metal layer and the first groove, of the first opening constitutes a second groove, a third groove below the first groove, a projection of the first groove on the first surface falls within a projection of the third groove on the first surface, a projection of the second groove on the first surface coincides with the projection of the third groove on the first surface; the second metal layer is formed in the first groove, the second groove and the third groove, and a surface, exposed from the second groove, of the second metal layer constitutes a bonding surface of the first bonding structure.