Patent ID: 7872333

Claim:
A layer system, comprising: an etched layer, whereby the etched layer is a silicon layer; and a passivation layer applied at least regionally to a surface of the silicon layer, wherein: the passivation layer includes a first, at least largely, inorganic partial layer and a second partial layer, and the second partial layer is made of an organic compound, wherein the organic compound has the general formula R a —R b —Si(X) 3-n —(R c ) n , R a being a perfluorinated polyether or a perfluorinated alkyl group having 1 to 16 carbon atoms, especially 6 to 12 carbon atoms, R b and R c being an alkyl group, and X being a halogen, an acetoxy group or an alkoxyl group, and n having a value of 0 to 2.