Résumé

This work presents a material screening study conducted while researching an 100% UV lacquer for an ink-jet coating application. In the first part of the study, spin-coating was used for creating a uniform coating of 7 μm over a metallic substrate. The uniformity and the defect-free characteristics of the coating were confirmed by FIB microscopy and by electrical tests, which were found to be a reliable tool for ensuring the preparation of defect-free coatings over metallic substrates. In the second part of the study, the manufacturing process was switched to ink-jet. The best jetting and UV curing parameters were found to ensure good wetting between consecutive coating layers while having sufficient curing. Although thicker coatings of about 20 μm/layer were produced using ink-jet, the defect-free characteristics were conserved up to 50 consecutive layers, confirming that thicker yet uniform coatings could be obtained by ink-jet. The new testing method was helpful during the material screening. Furthermore, we have shown that lacquer systems can be easily obtained by ink-jet printing and could be very useful for electrical engineering applications.

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