Patent ID: 11908829
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method comprising:
forming a first semiconductor device, the first semiconductor device comprising:
a semiconductor substrate;
an active device along a first side of the semiconductor substrate; and
an interconnect structure over the first side of the semiconductor substrate and electrically connected to the active device;

performing a first plasma process to deposit a buffer layer over the interconnect structure, the first plasma process utilizing a first power;
performing a second plasma process to deposit a first bonding layer over the buffer layer, the second plasma process utilizing a second power, the second power being greater than the first power;
attaching a substrate to the first bonding layer, the attaching the substrate comprising:
depositing a second bonding layer over the substrate; and
directly bonding the second bonding layer to the first bonding layer;

removing at least a portion of the semiconductor substrate; and
forming a first conductive feature along a second side of the semiconductor substrate.