Patent ID: 8313983
Filing Date: 2012-11-20
Classification: H01L,H05K,Y10T

Abstract:
1. A fabrication method for a resin encapsulated semiconductor device comprising a wiring substrate having first and second electrical connection metallic terminals; a semiconductor device; an electrical connector for electrically connecting the second electrical connection terminal to the semiconductor device; and an insulating encapsulating resin covering at least a portion of an assembly composed of the wiring substrate, the semiconductor device, and the electrical connector, the fabrication method including the steps of: (1) die-bonding the semiconductor device to the first electrical connection metallic terminal; (2) electrically connecting an electrode of the semiconductor device and the second electrical connection metallic terminal via the electrical connector; (3) surface treating the assembly by applying, to a surface of the assembly, a solution containing an organometallic compound decomposable at 350° C. or lower, wherein the metal of the organometallic compound has a free energy of oxide formation less than those of surface materials of the assembly, and a ligand of the organometallic compound is selected from a group consisting of 2-ethylhexanoate, neodecanoate, octylic acid, methacrylic acid, acrylic acid, naphthenic acid, acetate, and diethyl compounds, and then baking the applied solution in an oxidizing atmosphere to form, on the surface of the assembly, a coating containing an oxide of the metal of the organometallic compound; and (4) transfer-molding the insulating encapsulating resin onto the surface-treated assembly.