Patent ID: 11908757
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method of forming a chip package structure, comprising:
providing a redistribution structure;
attaching at least one semiconductor die to the redistribution structure;
forming a first underfill material portion between the redistribution structure and the at least one semiconductor die;
attaching a package substrate to the redistribution structure;
forming a second underfill material portion between the redistribution structure and the package substrate and around the redistribution structure; and
forming at least one cut region in the second underfill material portion by cutting portions of the second underfill material portion,
wherein the portions of the second underfill material portion are cut by performing a processing step selected from a first processing step or a second processing step,
the first processing step comprising irradiating a laser beam to each of the cut regions of the second underfill material portion, whereby a material of the second underfill material portion is ablated by laser irradiation by the laser beam, and
the second processing step comprising milling the portions of the second underfill material portion using a milling apparatus, whereby a material of the second underfill material portion is milled by the milling apparatus.