By
James J. Licari, AvanTeco, Whittier, CA, USA
Description
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.
Included in series
Materials and Processes for Electronic Applications
Audience:
Answers questions on how to protect electronics in space, high humidity and temperature for military and commercial environments, as well as for medical implants and high-heat automotive electronics.
