Metallic Paints for Printed Electronic Circuits and Other Uses.
BUREAU OF AERONAUTICS (NAVY) WASHINGTON DC
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Techniques developed in metallizing glass, ceramics, and similar materials by the application and firing of metallic paints have been greatly stimulated recently by the development of new uses in radio and electronics. While metallic films on glass have used for hundreds of years, particularly gold and silver for decorative purposes, this chapter will consider in greatest detail materials and methods employable in the newer applications such as printed circuits. Metallic paints are mixtures of metal powders or metal salts suspended in a liquid vehicle containing binders and thinners which must be fired at relatively high temperatures. The resultant coating is useful either to conduct electrical current or to provide an attractive decorative luster surface. The Mechanical Films described in Chapter VI are also suitable for electrical conductance but differ from Metallic Paints in that the binders used do not require high maturing temperatures. These paints are commercially available in 1 finely divided powder form, 2 a paste form, mixed with a suitable organic vehicle to form more or less thin paint-like consistency, and 3 a prepared paint-like mixture, ready for use, requiring no additional thinners.
- Coatings, Colorants and Finishes
- Inorganic Chemistry
- Electrical and Electronic Equipment
- Ceramics, Refractories and Glass
- Electricity and Magnetism