Patent ID: 8421181
Filing Date: 2013-04-16
Classification: H01L

Abstract:
1. A Schottky barrier diode comprising: a first-type substrate; a second-type well isolation region on said first-type substrate, a first-type well region on said second-type well isolation region; a perimeter capacitance well junction ring on said second-type well isolation region; a second-type well region on said second-type well isolation region, said perimeter capacitance well junction ring being positioned between and separating said first-type well region and said second-type well region; a second-type contact region on said second-type well region; a first-type contact region contacting an inner portion of said first-type well region, said inner portion of said first-type well region being positioned within a center of said first-type contact region; a first ohmic metallic layer on said first-type contact region; and a second ohmic metallic layer on said first-type well region, said first ohmic metallic layer contacting said second ohmic metallic layer at a junction, said junction comprising a Schottky barrier of said Schottky barrier diode; and said second-type well region having a lower portion contacting said first-type substrate, said lower portion of said second-type well region surrounding said second-type well isolation region.