Patent ID: 9412698
Filing Date: 2016-08-09
CPC Classification: H01L

Claim Text:
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 conductor formed in the first insulating film; a second insulating film formed above the first insulating film; a plurality of guard rings that surround the semiconductor circuit region; and an additional guard ring that surrounds the semiconductor region, wherein each of the guard rings is comprised of a first groove-shaped via-hole formed in the second insulating film; the additional guard ring is comprised of a second groove-shaped via-hole formed in the second insulating film; each of the first groove-shaped via-holes includes a pattern bent twice each time at an angle of larger than 90° at each of the four corners; each of the guard rings is coupled to the first conductor; the pattern is bent in total at 90° at each of the four corners of the rectangular semiconductor substrate; each of the first groove-shaped via-holes is filled with a second conductor that is electrically coupled to the substrate, and the second groove-shaped via-hole is filled with a third conductor formed in the second groove-shaped via-hole and electrically coupled to the substrate.