Patent ID: 8633095

Claim:
A method of manufacturing a voltage compensation structure, comprising: etching a trench into an epitaxial semiconductor material doped with n-type dopant atoms and p-type dopant atoms having diffusion constants differing by less than 50%; disposing a first semiconductor or insulating material along one or more sidewalls of the trench, the first semiconductor or insulating material having a dopant diffusion constant which is at least 2× different for the n-type dopant atoms than the p-type dopant atoms; disposing a second semiconductor material in the trench along the first semiconductor or insulating material, the second semiconductor material having a different dopant diffusion constant than the first semiconductor or insulating material; and diffusing more n-type dopant atoms or p-type dopant atoms from the epitaxial semiconductor material through the first semiconductor or insulating material into the second semiconductor material than the other type of dopant atoms so that a lateral charge separation occurs between the second semiconductor material and the epitaxial semiconductor material.