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

Claim 8:
9. A semiconductor package, comprising:
a redistribution substrate including an insulating layer, a redistribution layer on the insulating layer, and a pad partially embedded in a 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 including regular depressions and protrusions, the regular depressions and protrusions including peaks and valleys having a uniform pitch and depth, and
an edge surface surrounding the recess surface and including irregular depressions and protrusions, the irregular depressions and protrusions including peaks and valleys having different pitches and depths;

a semiconductor chip on the redistribution substrate and electrically connected to the redistribution layer; and
a protective layer on a side of the redistribution substrate opposite to the semiconductor chip, the protective layer including an opening exposing at least the recess surface of the lower surface of the pad.