Patent ID: 6642606
Filing Date: 2003-11-04
Classification: H01L

Abstract:
A method for producing siliconized and non-siliconized polysilicon regions in integrated semiconductor structures of a semiconductor blank comprising the steps of providing a semiconductor blank having at least one structure formed in a first polysilicon layer and a layer of a first dielectric material superimposed on the first polysilicon layer; applying a second polysilicon layer onto the layer of the first dielectric material; applying a layer of a second dielectric material onto the second polysilicon layer, the second dielectric material being different from the first dielectric material; forming at least one predetermined structure in the layers of the second dielectric material and of the second polysilicon; removing the regions of the layer of the first dielectric material that are not covered by the at least one predetermined structure by means of etching the first dielectric material selectively relative to the second dielectric material, so that at least one structure fashioned in the first polysilicon layer is partly uncovered to provide at least one uncovered structure and the second polysilicon layer continues to be covered by the second dielectric material; and forming a silicide layer on the at least one uncovered structure, whereby the second polysilicon layer is protected against a siliconization by the second dielectric material.