Patent ID: 6992362

Claim:
A semiconductor comprising: a plurality of dielectrically-isolated semiconductor devices, each formed in a unique epitaxial tub of a plurality of epitaxial tubs, each epitaxial tub being of a first conductivity type and being formed within a dielectric material, each dielectrically-isolated semiconductor device formed in its said unique epitaxial tub includes a surface diffusion region; a field-limiting diffusion region disposed between an edge of the dielectric material and the surface diffusion region, the field-limiting diffusion region having a second conductivity type opposite that of the first conductivity type; a first contact electrically coupling the field-limiting diffusion region to a first conductive layer; and a second contact electrically coupling the surface diffusion region to a second conductive layer; a field plate is disposed over the dielectric material separating adjacent dielectrically-isolated semiconductor devices, the field plate vertically positioned above a portion of the first contact and below the second conductive layer and overlapping an edge of at least one adjacent semiconductor device; and a trench having a plurality of trench sections surrounds each dielectrically-isolated semiconductor device.