Patent ID: 7230313
Filing Date: 2007-06-12
Classification: H01L

Abstract:
1. A power semiconductor device comprising: a substrate having a central region an and outer edge; an active region disposed in the central region of the substrate and defined by first and second regions highly doped with the same or opposite polarity of dopant; an insulating layer over the substrate and between the active region and the edge of the substrate; at least three field plates on the insulating layer and disposed between the active region and the outer edge of the substrate, said field plates each having an outer edge facing the edge of the substrate and an inner edge facing the active region and each having an applied voltage potential such that the voltage potential difference between the first and second field plates is different from the voltage potential difference between the second and third field plates to generate electric fields in the substrate below the field plates wherein said electric fields have substantially the same contours; and a voltage divider network of resistors.