Elaboration of thick films using serigraphy

Elaboration of thick films using serigraphy 7.2.4.I. Method description 

This method (see Fignre 7.32) consists of depositing the sensitive material to form a thick film, nsing a paste (also called ink). The paste, supported by a screen, including a window that has a thin mesh, is deposited using a scraper on an alpha-alumina substrate. 

the substrate being located under the screen, we deposit ink on the screen. 

The metallic mesh allows the ink to pass through when the ink is under the scraper s pressure. The structure of deposits is controlled by the presence of a polymeric film covered by a mesh at the places where the paste is not to be deposited. 

This technology, commonly used in the industiy, is particularly well adapted to mass production. The quality of the deposited film mostly depends on the physicochemical properties of the paste used. 

---