Patent ID: 8492866

Claim:
A diode comprising: a first well region, having a first type conductivity, in a semiconductor layer; a second well region, having a second type conductivity different from said first type conductivity, in said semiconductor layer and positioned laterally adjacent to and abutting said first well region at an interface; a first contact region, having said first type conductivity, at a top surface of said semiconductor layer within said first well region; a second contact region, having said second type conductivity, at said top surface of said semiconductor layer traversing said interface such that a first end of said second contact region extends laterally into said first well region and a second end of said second contact region extends laterally into said second well region; an isolation region at said top surface of said semiconductor layer within said first well region, and positioned laterally between said first contact region and said first end of said second contact region; and a conductive field plate on said isolation region within said first well region and extending laterally onto said first end of said second contact region within said first well region such that said conductive field plate has a first sidewall aligned above said isolation region and a second sidewall opposite said first sidewall, aligned above said first end of said second contact region within said first well region and offset from said interface so that said conductive field plate covers less than all of said first end of said second contact region within said first well region.