Patent ID: 7880301
Filing Date: 2011-02-01
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor element comprising a semiconductor substrate having an element region, a laminated film formed on the semiconductor substrate and including a low dielectric constant insulating film, and a laser-machined groove provided to enclose the element region, cutting at least the low dielectric constant insulating film of the laminated film, and having a width X (μm); a wiring substrate connected to the semiconductor element via a bump electrode; and an underfill material filled in an entire space between the semiconductor element and the wiring substrate except for an area that the bump electrode occupies, and having a fillet shape with a fillet length Y (mm), wherein the width X (μm) of the laser-machined groove and the fillet length Y (mm) of the underfill material satisfy conditions of X=5 to 15 μm, Y=1 to 3.5 mm, and Y>−0.233X+3.5.