Patent ID: 7220664
Filing Date: 2007-05-22
Classification: H01L

Abstract:
1. A fabrication method for a semiconductor structure in a substrate, the semiconductor structure having at least two regions that are to be patterned differently, comprising: (a) fabricating a patterned first region in the substrate, so that the semiconductor structure has a non-patterned second region and the patterned first region; (b1) depositing a cover layer on horizontal planes of the semiconductor structure, the cover layer growing over the patterned first region, so that the cover layer above the patterned first region forms a closure, which covers over the patterned first region without completely filling the first region, and forms a horizontal surface above the semiconductor structure; (b2) providing a first barrier layer above the horizontal surface of the cover layer; (b3) providing a second barrier layer above the first barrier layer; (b4) providing a structure by means of a first mask for an unpatterned second region above the semiconductor structure; (b5) transferring the structure into the second barrier layer, so that the regions of the second barrier layer that are to be removed on account of the structure are selectively removed for the formation of a process window; (b6) transferring the structure into the first barrier layer, so that the regions of the first barrier layer that are to be removed on account of the structure are selectively removed for the further formation of the process window; (b7) transferring the structure into the cover layer, so that the regions of the cover layer that are to be removed on account of the structure are selectively removed, thereby further forming the process window for the further patterning of the second region; and (c1) fabricating the patterned second region in the process window, the patterned first region remaining protected at least by the cover layer; and (d) removing the cover layer above the semiconductor structure which has the two differently patterned regions.