Patent ID: 8741203

Claim:
A method for processing light-polymerizable material ( 5 , 55 , 105 ) for building up an object ( 27 ) in layers, using a lithography-based generative fabrication technique in which light-polymerizable material ( 5 , 55 , 105 ) is polymerized on a build platform ( 12 , 62 ) in a layer ( 28 ) with prescribed geometry by exposure in an exposure area, the build platform ( 12 , 62 ) is displaced for forming of a subsequent layer, light-polymerizable material ( 5 , 55 , 105 ) is newly fed into a vat ( 4 , 54 , 104 ) in a region of the layer ( 28 ) last formed, and by repeating the previous steps, the object ( 27 ) is built up in layers in a desired form, which results from a sequence of layer geometries, at least during the polymerization of a first layer ( 28 ) directly on the build platform ( 12 , 62 ), light is irradiated from a side of the build platform ( 12 , 62 ) opposite to the side with the first layer ( 28 ) to be polymerized, the build platform ( 12 , 62 ) being formed such that it is at least partially transparent or translucent, wherein the light-polymerizable material ( 5 , 55 , 105 ) on an underside of the build platform ( 12 , 62 ) is polymerized by exposure from below the build platform, in that the build platform ( 12 , 62 ) is raised in relation to the vat bottom ( 6 , 56 ) after each exposure step and in that the light-polymerizable material ( 5 , 55 , 105 ) is newly fed under the layer ( 28 ) last formed, and wherein, after renewed feeding of light-polymerizable material, the build platform ( 12 , 62 ) with the layers formed on it, is lowered again into the newly fed light-polymerizable material ( 5 , 55 , 105 ), so that light-polymerizable material is displaced from an intermediate space with respect to a vat bottom ( 6 , 56 ), and a distance between a lowered lower surface and the vat bottom is set in a prescribed manner.