Patent ID: 9219025
Filing Date: 2015-12-22
Classification: H01L

Abstract:
1. A method of manufacturing a molded flip-chip semiconductor package, the method comprising: providing a leadframe having opposing first and second main surfaces, a first metallization on the first main surface, a second metallization on the second main surface, and recessed regions which extend from the second main surface toward the first main surface; filling the recessed regions with a first molding compound such that the leadframe is protected by the first molding compound and the second metallization at a second side of the leadframe and exposed between gaps in the first metallization at a first side of the leadframe opposite the second side; etching the exposed part of the leadframe between the gaps in the first metallization with a chemical etchant to form spaced apart leads at the first side of the leadframe, the first molding compound and the second metallization protecting the leadframe from the chemical etchant at the second side; placing a plurality of semiconductor dies on the leadframe such that pads of the semiconductor dies face the leads of the leadframe; attaching the pads to the leads of the leadframe; and encasing the semiconductor dies with a second molding compound that fills the space between the leads such that the second molding compound abuts the first molding compound, wherein the first molding compound is a multi-functional molding compound and the second molding compound is multi-aromatic molding compound.