Thin-layer cell

A process for producing a flow cell for the spectroscopic analysis of samples to be passed through, the process comprising the following steps:

• (a) provision of a first and of a second window, the second window having at least two sample flow channels for supplying and removing the sample to be analyzed;
• (b) application of a structured thin layer to one of the windows;
• (c) contacting and liquid-tight securing of the thin layer to the other window, in such a way that facing, plane-parallel window surfaces of the windows and the thin layer delimit a flow chamber which is accessible only through the sample flow channels, the windows being optically transparent at least in some regions at least in the region of the flow chamber;
• and
• (d) filling at least some regions of a filling chamber between the windows which is separated from the flow chamber by the thin layer and adjoins the structured thin layer with adhesive, and the liquid-tight securing of the thin layer to the other window includes a softening of the thin layer to temporarily lower its viscosity by increasing the temperature of the thin layer and/or by increasing the pressure applied on the thin layer to the other window, and wherein the thin layer is removed after step (d).