A method for the manufacture of micro-mechanical components from a stack of layers having at least a substrate, a sacrificial layer and a layer which is to be undercut includes forming at least one etch hole in the layer, which is to be undercut, and providing at least one passivation layer for controlling a selective depositing of a cover material which closes each of the etch holes after a step of etching the sacrificial layer. The passivation layer makes it possible that the undercut layer elements do not become excessively thick or grow together with the substrate due to the deposition of the cover material.