Patent ID: 8637945

Claim:
A method for manufacturing micromechanical microphone components, comprising: depositing a first electrically insulating sacrificial layer on a semiconductor substrate; depositing a diaphragm layer on the first sacrificial layer and patterning the diaphragm layer to produce at least one diaphragm having a spring suspension for each of the components; depositing a second electrically insulating sacrificial layer on the patterned diaphragm layer; depositing at least one additional layer on the second sacrificial layer and patterning to produce for each diaphragm an acoustically permeable counter element; producing at least one sound opening under each diaphragm in a rear side of the semiconductor substrate; removing the first sacrificial layer and the second sacrificial layer at least in a region underneath and above each individual diaphragm and spring suspensions of the diaphragms; dicing up the components only after microphone structures have been exposed; wherein following the exposure of the microphone structures, a protective foil is deposited on layers above the semiconductor substrate, which prevents entry of particles and fluid into the microphone structures, and the protective foil is removed from the component surface after the components have been diced up, without leaving any residue.