Patent ID: 7875560

Claim:
A process for producing a semiconductor having an insulation structure comprising: providing a semiconductor substrate; producing and patterning an implantation mask on a surface of the semiconductor substrate; implanting an element or elements into at least one subregion of the semiconductor substrate, the implanted element or elements being selected in such a manner that on thermal activation they form an insulation region together with further elements of the semiconductor substrate; irradiating the semiconductor substrate with laser radiation and performing laser annealing in the melt mode so that the semiconductor substrate with the at least one subregion is melted within a depth from 100 to 300 nm below the surface of the semiconductor substrate; recrystallizing as the insulation region the at least one subregion to form the insulation structure; wherein the elements are implanted according to an implantation profile extending as far as the surface of the semiconductor substrate.