by Hal Greenhouse

Features:

• Brings together in a single resource virtually every issue involving hermeticity
• Written for novices as well as scientists, engineers and technicians with experience in the field
• Contains scores of graphs for solving problems and explaining mathematical relationships
• Includes nearly 100 common hermeticity problems encountered on the job, along with their solutions

Hermeticity of Electronic Packages is about the integrity of sealed packages to resist foreign gases and liquids penetrating the seal or an opening (crack) in the package - especially critical to the reliability and longevity of electronics. The author explains how to predict the reliability and the longevity of the packages based on leak rate measurements and the assumptions of impurities.

Non-specialists in particular will benefit from the author’s long involvement in the technology. Hermeticity is a subject that demands practical experience, and solving one problem does not necessarily give one the background to solve another. Thus, the book provides a ready reference to help deal with day to day issues as they arise.

The book gathers in a single volume a great many issues such as

• How to define the "goodness" of a seal?
• How is that seal measured?
• How does the integrity of the seal affect circuit reliability?
• What is the significance of the measured integrity of the seal?
• What is the relationship of Residual Gas Analysis and the seal integrity?

Hermeticity of Electronic Packages answers these questions and more, providing an analysis of nearly 100 problems representative of the wide variety of challenges that actually occur in industry today.

Contents

1. Gas Kinetics
2. Viscous and Molecular Conductance of Gases
3. The Flow of Gases
4. The Flow of Gases into Sealed Packages
5. Water in Sealed Packages
6. Understanding Helium Fine Leak Testing in Accordance with Method 1014
7. Fine Leak Measurements Using a Helium Leak Detector
8. Gross Leaks
9. The Permeation of Gases through Solids
10. Residual Gas Analysis (RGA)

Appendix
Index

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