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Solder Mask Handbook
1 INTRODUCTION
1.1 Background
Solder masks are permanent protective coatings that perform a number of functions during the fabrication, assembly and end use of printed circuits. One of the main purposes of solder mask is to protect the circuitry from interacting with solder during the assembly process. A solder mask’s job isn’t solely restricted to the solder operation however, as it also helps to protect the laminate, holes and traces from collecting contaminants and from degrading during the service life of the circuit. It also acts as an insulator of known dielectric property between components and traces.
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