Patent ID: 11908836
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A method of forming a semiconductor package, the method comprising:
bonding a first die to a second die, wherein the first die comprises a plurality of first bonding pads, wherein the second die comprises a plurality of second bonding pads bonded to corresponding ones the plurality of first bonding pads, wherein the second die comprises a plurality of through vias electrically connected to corresponding ones of the plurality of second bonding pads;
forming an encapsulating material over the first die, wherein the encapsulating material laterally encapsulates the second die;
recessing a surface of the second die to below an upper surface of the encapsulating material to form a recess;
forming an isolation layer in the recess on the second die;
forming a plurality of first alignment marks in the isolation layer, wherein a pitch between adjacent two first alignment marks of the plurality of first alignment marks is different from a pitch between adjacent two through vias of the plurality of through vias; and
forming a redistribution structure over the second die and the encapsulating material.