Patent ID: 8686502

Claim:
An apparatus with at least one Schottky diode integrated into an LDMOS comprising: a substrate; a first layer of lightly doped n-type epitaxial material formed over the substrate; a p-well formed in the first layer, wherein the well has a rectangular surface topology which includes a rectangular aperture in the p-well exposing the under-lying lightly doped n-type material; wherein a long side of the rectangular aperture is aligned with a long side of the pâˆ’ well and further wherein the sides of the rectangular aperture are inside and spaced apart from the rectangular sides of the p-well; an n+ drain formed in the lightly doped n-type epitaxial region spaced apart from the p-well; at least one Schottky diode formed by providing a metal or metalized region that forms a diode within the surface of the aperture exposing the lightly doped n-type region in the p-well, wherein the metal or metalized region over the diode forms an anode of the diode; wherein the metal or metalized region comprises a silicide region over surface of the aperture exposing the lightly doped n-type region in the p-well; a source divided into multiple n+ source regions by intermediate p+ body contact regions, wherein the p+ body contact regions between the multiple n+ source regions are configured to increase the safe operating area of the apparatus; a p+ ring coupled to the p-well and surrounding each at least one Schottky diode, wherein the p+ ring provides edge termination of the at least one Schottky diode to reduce leakage; and the metal or metalized region coupling the n+ source region, the p+ body contact regions and the anode of the at least one Schottky diode.