Patent ID: 11961791
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A device comprising:
a bottom package comprising:
a redistribution line comprising:
a lower portion forming a first recess and a second recess, wherein the lower portion of the redistribution line comprises a first portion underlying the first recess, and second portions forming sidewalls of the first recess; and
an upper portion connecting to a top end of the lower portion;

an encapsulant over the redistribution line, wherein the encapsulant comprises a planar top surface, and wherein the encapsulant fills the second recess;
a first solder region extending into the first recess;
a second solder region over and joined to the upper portion of the redistribution line; and
a die over and bonded to the second solder region; and

a top package bonded to the first solder region.