Glossar - Begriffe und Terminologien von Leiterplatten

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Property of a material to reduce its viscosity under mechanical influence / shearing stress by means of pumping, stirring, squeegee pressure and to return to its original conditions after the stress has finished. Screen-printing inks, for instance, have a very high thixotropy. On account of the squeegee pressure and the movement the screen-printing ink becomes thinner and thus flows through the screen meshes onto the substrate to be coated. After lifting-off of the screen/stencil the ink must “stand”; it has to achieve its original condition rapidly and must not flow anymore, which ensures a good edge coverage.