Patent ID: 11929315
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A semiconductor package, comprising:
a redistribution substrate including an insulating layer, a redistribution layer in the insulating layer, and a pad partially embedded in one side of the insulating layer opposite to the redistribution layer so that a lower surface of the pad is exposed from the insulating layer, the lower surface of the pad including a recess surface and an edge surface surrounding the recess surface;
a semiconductor chip on the redistribution substrate and electrically connected to the redistribution layer;
an encapsulant encapsulating at least a portion of the semiconductor chip; and
a protective layer on the one side of the insulating layer of the redistribution substrate opposite to the semiconductor chip, the protective layer including an opening exposing the recess surface and at least a portion of the edge surface,
wherein:
an interval in a vertical direction between the edge surface and an upper surface of the pad is greater than an interval in the vertical direction between the recess surface and the upper surface of the pad,
a surface roughness (Ra) of the recess surface is less than a surface roughness (Ra) of the edge surface,
the recess surface includes depressions and protrusions having a plurality of concentric shapes radially spaced apart from each other in a plan view.