Patent ID: 7829368

Claim:
A method of forming a diode, the method comprising the acts of: forming an epitaxial layer of a first conductivity type over a substrate, the substrate being of the first conductivity type and having a higher active dopant concentration than the epitaxial layer; forming a first doped region of a second conductivity type within the epitaxial layer such that the first doped region forms a first junction with the substrate; forming a second doped region by implanting a dopant of the first conductivity type within the first doped region, such that the second doped region meets a portion of the epitaxial layer at a lateral edge thereof and such that the second doped region forms second and third junctions with the first doped region; and forming a third doped region of the first conductivity type within the epitaxial layer and above the first doped region such that the third doped region forms a fourth junction with a top surface of the first doped region.