Patent ID: 7781300

Claim:
A method for producing a semiconducting structure, comprising: controlled formation, through a mask, in a first substrate in a semiconducting material, of at least one first area in an insulating material, up to the level of the lower surface of the mask, before removal of the mask, so that after removal of the mask the upper level of this first area is at the level of the lower surface of the mask, wherein the formation of insulating material at least partly includes thermal growth of said insulating material in the semiconducting substrate and/or deposition of said insulating material, and removal of the mask after said formation, the insulator formation step including: a1) a substep for controlled growth of an insulating material, up to above the level of the lower surface of the mask, and a2) a substep for selectively thinning the insulating material, in order to bring it back to the level of the lower surface of the mask.