Patent ID: 9224689
Filing Date: 2015-12-29
Classification: H01L

Abstract:
1. A semiconductor device comprising: a rectangular semiconductor substrate including a semiconductor circuit region and four corners; a first insulating film formed above the rectangular semiconductor substrate; a first conductive layer formed in the first insulating film; a second insulating film formed above the first insulating film; and a plurality of guard rings surrounding the semiconductor circuit region; wherein: each of the guard rings includes a groove-shaped via-hole formed in the second insulating film; the groove-shaped via-hole includes a pattern bent twice each time at an angle of larger than 90° at each of the four corners; the groove-shaped via-hole is bent totally at 90° at each of the four corners of the rectangular semiconductor substrate; a copper layer formed in the groove-shaped via-hole and connected to the first conductive layer; and the first insulating film is a first SiOC based film and the second insulation film is a second SiOC based film.