Conformal coating Application processes

As mentioned earlier, there is a considerable need for a conformal metallic coating with resistivity close to that of aluminum, but with a higher melting point. Of the ones we have been considering, the two lowest resistivity candidates are molybdenum and tungsten. Tungsten has received the most attention since the H2 reduction of WF6 process has been under development for a variety of applications since 1967.15 The extent of current interest can be seen in a recent publication.16... 

The powder can be applied directly to the substrate surface by electrostatic coating processes or dusting onto a warmed surface. It can also be formed into shapes or preforms by the application of pressure in a die mold. This process is similar to how pharmaceutical tablets are made. In this way shaped preforms can be made that will conform to a specific joint geometry. There are a wide variety of applications to which epoxy preforms can be adapted. They can be used to... 

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