Patent ID: 6156217
Filing Date: 2000-12-05
Classification: G03F

Abstract:
Method for the purpose of producing a stencil mask, which comprises a sheet having structures in the form of orifices, wherein the method comprises the following sequence of steps:a) selecting a flat substrate having upper and lower sides and consisting of a specific material comprising a thickness greater than 50 .mu.m,b) producing a thin intermediate layer on the upper side of the substrate,c) structuring this intermediate layer by means of a lithographic process with the structures for the mask which is to be produced,d) etching the lower side of the substrate at least in the region of the structures provided for mask orifices, until the substrate comprises in this region a thickness less than 50 .mu.me) etching the upper side of the substrate using the structured intermediate layer as a masking layer, in order to form in the substrate the orifices of the mask which orifices correspond to the structures of the intermediate layer, andf) removing the intermediate layer.