Patent ID: 6787873
Filing Date: 2004-09-07
Classification: H01L

Abstract:
A semiconductor device comprising:a circuit region including transistors formed on a first conductivity type semiconductor substrate; a first guard ring of a high concentration, first conductivity type ion diffused region formed around said circuit region; a diffused region in which a high concentration of second conductivity type ions are diffused to surround said first guard ring; a second guard ring of a first conductivity type ion diffused region formed around said diffused region; a first metal film pattern formed opposing to said first guard ring with an insulating film interposed therebetween and that is connected to the first guard ring by a plurality of interlayer wires; a second metal film pattern formed opposing to said second guard ring with said insulating film interposed therebetween and that is connected to the second guard ring by a plurality of interlayer wires; a first metal wire connecting said first metal film pattern to an external terminal to which a standard potential is provided; and a second metal wire connecting said second metal film pattern to said external terminal.