Stencil Screens for Fine-Line Printing

[摘要] During the past decade, the thick film process has become a viable technology for the production of numerousvarieties of electronic circuits. Improvements in the quality of the substrates, the thick film inks, and themanufacturing equipment have all been significant. In addition, the quality of the stencil screens has also beenimproved to aid the process. New types of mesh material, improved emulsion systems and better control of thescreen parameters have all been realized. These refinements in the screen making materials and processes have allcontributed to the feasibility for printing complex resistor and conductor networks, hybrid circuits, multilayerarrays, and sophisticated watch and display patterns.This paper will present the critical parameters of the screen mesh materials and compare the characteristics ofthe screen mesh materials and compare the characteristics of the nylon, polyester, stainless steel and metalizedpolyester fabrics. A new fine-wire 325 mesh stainless steel will be discussed and the significant impact on thetechnology of fine-line printing will be illustrated. In addition, recent developments in screen emulsions will beoffered and pictures of fine-line patterns will be shown.

[学科分类] 工程和技术（综合）