Patent ID: 8637997
Filing Date: 2014-01-28
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; a semiconductor element that is flip-chip connected to the substrate over a plurality of solder balls mounted on the substrate such that a space is formed between the substrate and the semiconductor element, the semiconductor element comprising a plurality of side surfaces and an upper surface; a molding portion comprising separate inclined portions formed to entirely enclose the plurality of side surfaces of the semiconductor element; a fixing portion comprising an adhesive agent and disposed over an upper surface of the semiconductor element; and a built-in semiconductor device horizontally mounted over the semiconductor element, a bottom surface of the built-in semiconductor device being fixed to the semiconductor element through the fixing portion, wherein no portion of the upper surface is enclosed by the molding portion, further wherein a thermal conductivity of the molding portion is lower than a thermal conductivity of the semiconductor element.