The model is thus built up layerwise.

The film is produced by welding or gluing together layer-by-layer.

This paste is then applied to the membrane in the form of a layer, especially by screen printing.

A substrate is provided to a process chamber, and a layer of dopant source material is deposited by plasma deposition, atomic layer deposition, or plasma-assisted atomic layer deposition.

The correction factor is determined from difference between ideal layerwise mode delay and actual layerwise mode delay.

According to the invention the riblet foil (10) has a layered structure.

A method is described here for the layerwise construction of models, wherein, in a building region, a particulate material is applied layerwise and selectively cured.

The process also comprises determining the correction factor from difference between ideal layerwise alpha and actual layerwise alpha.

The method allows making different tangible products in a continuous process by layerwise manufacturing.

The process may further comprise, after sintering the extruded tube, layering an electrolyte onto the tubular anode; and, after layering the electrolyte (240), layering a cathode (220) onto the electrolyte.