This first book in the Materials and Processes for Electronics
Applications series answers questions vital to the successful
design and manufacturing of electronic components, modules, and
systems such as:
- How can one protect electronic assemblies from prolonged high
humidity, high temperatures, salt spray or other terrestrial and
space environments?
- What coating types can be used to protect microelectronics in
military, space, automotive, or medical environments?
- How can the chemistry of polymers be correlated to desirable
physical and electrical properties?
- How can a design engineer avoid subsequent potential failures
due to corrosion, metal migration, electrical degradation,
outgassing?
- What are the best processes that manufacturing can use to mask,
clean, prepare the surface, dispense the coating, and cure the
coating?
- What quality assurance and in-process tests can be used to
assure reliability?
- What government or industry specifications are available?
- How can organic coatings be selected to meet OSHA, EPA, and
other regulations?
Besides a discussion of the traditional roles of coatings for
moisture and environmental protection of printed circuit
assemblies, this book covers dielectric coatings that provide
electrical functions such as the low-dielectric-constant
dielectrics used to fabricate multilayer interconnect substrates
and high-frequency, high-speed circuits.
Materials engineers and chemists will benefit greatly from a
chapter on the chemistry and properties of the main types of
polymer coatings including: Epoxies, Polyimides, Silicones,
Polyurethanes, Parylene, Benzocyclobenzene and many others.
For manufacturing personnel, there is an entire chapter of over a
dozen processes for masking, cleaning, and surface preparation and
a comprehensive review of over 20 processes for the application and
curing of coatings including recent extrusion, meniscus, and
curtain coating methods used in processing large panels. The pros
and cons of each method are given to aid the engineer in selecting
the optimum method for his/her application. As a bonus, from his
own experience, the author discusses some caveats that will help
reduce costs and avoid failures.
Finally, the author discusses regulations of OSHA, EPA, and other
government agencies which have resulted in formulation changes to
meet VOC and toxicity requirements. Tables of numerous military,
commercial, industry, and NASA specifications are given to help the
engineer select the proper callout.
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