Hermeticity of Electronic Packages

1st Edition

Authors: Hal Greenhouse Hal Greenhouse
Hardcover ISBN: 9780815514350
eBook ISBN: 9780815517887
Imprint: William Andrew
Published Date: 31st December 1999
Page Count: 426
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Description

This is a book 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 previously available only in journals—or only in the experience of working engineers. 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? The handbook 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.

Readership

Packaging engineers, scientists and technicians as well as novice users, package designers, reliability engineers and those who measure and evaluate the integrity of packages, especially in the field of microelectronics.

Table of Contents

Hermeticity of Electronic Packages About The Author Dedication Preface Contents 1 Gas Kinetics 1.0 General Considerations 1.1 Boyle's Law 1.2 Charles's Law (1787) Or Gay-Lussac's Law (1802) 1.3 Dalton's Law (1801) 1.4 Avogadro's Law (1811) 1.5 Avogadro's Number 1.6 Loschmidt's Number 2.0 Mathematical Relationships 3.0 Problems and Their Solutions References 2 Viscous and Molecular Conductance of Gases 1.0 Conduction of Gases 2.0 Viscous Conduction 3.0 Molecular Conduction 4.0 Conduction In The Transitional Range 5.0 Composite Conductance Equations 6.0 Smallest Theoretical Leak 7.0 Discussion 8.0 Problems and Their Solutions References 3 The Flow of Gases 1.0 General Flow Characteristics 2.0 Measured, Standard and True Leak Rates 3.0 Leak Rates for Different Gases 4.0 Change of Partial Pressure with Time 5.0 Viscous Flow from Sealed Packages 6.0 Viscous Flow Rates of Different Gases 7.0 Problems and Their Solutions References 4 The Flow of Gases Into Sealed Packages 1.0 Molecular Flow 2.0 Viscous Flow into and out of Sealed Packages 3.0 The Simultaneous Flow of Gases in Both Directions 4.0 Problems and Their Solutions 5 Water In Sealed Packages 1.0 Water Related Corrosion and Circuit Failures 2.0 Water Leaking Into a Sealed Package from the Outside Environment 3.0 Water Outgassing Inside the Package 4.0 Water As a Result of a Chemical Reaction Within The Package 5.0 Problems and Their Solutions References 6 Understanding Helium Fine Leak Testing in Accordance with Method 1014, Mil-Std-883 1.0 Purpose of the Test 2.0 Basis of The Test 3.0 Fixed Method of Testing 4.0 Flexible Method of Testing 5.0 Comparison of The Fixed and Flexible Methods 6.0 The Effect of Viscous Flow

Details

No. of pages:
426
Language:
English
Copyright:
© William Andrew 1999
Published:
Imprint:
William Andrew
eBook ISBN:
9780815517887
Hardcover ISBN:
9780815514350

About the Author

Hal Greenhouse

Affiliations and Expertise

Bendix Aviation Corporation (retired)

Hal Greenhouse

Affiliations and Expertise

Bendix Aviation Corporation (retired)