Patent ID: 7786569
Filing Date: 2010-08-31
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a wiring substrate; a semiconductor chip making flip chip connection to the wiring substrate; under-filling resin with which a gap between the wiring substrate and the semiconductor chip is filled up; a heat spreader adhered to the semiconductor chip; a power supply pattern and a wiring layer under surface via land which are formed on the wiring substrate and spaced out each other by a clearance region; an insulating film which covers the power supply pattern and the wiring layer under surface via land; a wiring layer via land formed on the insulating film; a via which penetrates the insulating film and connects the wiring layer under surface via land to the wiring layer via land; and a wiring which is formed on the insulating film, passes over the clearance region, and connects the wiring layer via land to the semiconductor chip; wherein the wiring layer via land is formed outside the semiconductor chip, and within a region of 1 mm width from an extension line of a diagonal line of the semiconductor chip; and an angle of a lead-out direction of the wiring from the wiring layer via land to an extension line of a diagonal line of the semiconductor chip is 20° or more.