McDermott Will & Emery LLP
Fan-out semiconductor package
A fan-out semiconductor package includes: a first interconnection member having a through-hole; a semiconductor chip disposed in the through-hole; an encapsulant encapsulating at least portions of the first interconnection member and the semiconductor chip; a second interconnection member disposed on the first interconnection member and the semiconductor chip and including redistribution layers electrically connected to the connection pads of the semiconductor chip; a passivation layer disposed on the second interconnection member and having openings exposing at least portions of the redistribution layer of the second interconnection member; and an under-bump metal layer disposed on the passivation layer and filling at least portions of the openings. In the under-bump metal layer, the number of conductor layers formed on a surface of the passivation layer is different from that of conductor layers formed on the exposed redistribution layer and walls of the openings.
Samsung Electro-Mechanics Co., Ltd.
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Jung Soo Doo Hwan Dae Jung
Kim Lee Byun