Solder Paste Deposition Research Articles

Thick Film Screen Techniques

Basic properties of screen materials are defined, with a study of different mesh formations and coatings and their effect on the printed image. Detailed specifications are given for a range of stainless steel, polyester, and nylon fabrics. A table then summarises recommendations for specific thick film applications such as conductor tracks, fine line conductor tracks, resistors, solder paste deposition, dielectric layers, and overglazes. The requirements for the artwork and photopositive are examined, with recommended procedures for exposing and processing the mask. The survey concludes with notes on other factors which commonly influence quality at the print stage.