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IMAPS PDC Webinar Series on
Near Hermetic Packaging Concepts for Military and Medical Devices

This two-session on-line Professional Development Course (PDC) webinar was held:
Tuesdays, November 17 and 24, 2009

All webinars were held 12:00 noon - 1:00 pm EST

IMAPS Members: $125 per webinar; 2-course series $200
Non-members: $200 per webinar; 2-course series $375 (includes one-year complimentary individual membership in IMAPS)

Registration Deadline: November 16, 2009

Key Words

Hermeticity, Near Hermetic, moisture diffusion, TM 1014, TM 1018, Fick’s law

Program Description

Packages made from polymeric materials as opposed to traditional hermetic seals (i.e. metal, ceramic etc) require a different approach from a hermeticity testing standpoint. The problem is now one of moisture diffusion through the barrier and package interfaces, which is different that water vapor permeating a crack in a glass to metal interface. A brief review of the techniques and methods to evaluate a "non-hermetic" approach is presented along with a discussion of the pitfalls and issues of TM 1014 and TM 1018 as applied to a “near hermetic package”. Each session is scheduled for 50 minutes of lecture followed by 10 minutes of Q&A.

Tuesday, November 17, 12:00-1:00 PM EST

Cavity style packages made from polymeric materials such as LCP or Teflon or other types of packages that are coated with a polymer as opposed to traditional hermetic seals require a different approach from a leak testing standpoint. The problem is now one of moisture diffusion through the polymer or barrier.  

  • Military and Medical Market Drivers
  • “Near Hermetic” cavity package defined
  • The “Hermeticity Myth”
  • MIL-STD-883 TM 1014 and TM 1018 Do they apply?

Tuesday, November 24, 12:00-1:00 PM EST

A brief review of the techniques and methods to evaluate a "non-hermetic" approach is presented along with the fundamental theory.

  • Fick’s Law of Moisture Diffusion
  • WVTR, TGA and moisture diffusion coefficients
  • Moisture Sensing (wired and wireless sensors)
  • How to qualify a “near hermetic “ package

Who Should Attend?

This PDC is intended as an intermediate level course for process engineers, designers, quality engineers, and managers responsible for sealing, leak testing and RGA results and for those responsible for evaluating new polymeric cavity style packages.

Thomas Green


Mr. Thomas Green is an independent consultant and the Technical Director at TJ Green Associates LLC, a Veteran owned small business. He has over twenty-five years experience in the microelectronics industry and has worked at Lockheed Martin Astro Space and USAF Rome Laboratories. At Lockheed he was a Staff engineer responsible for the materials and manufacturing processes used in building custom high reliability space qualified microcircuits for military and commercial communication satellites. Tom has demonstrated expertise in seam sealing and leak testing processes. He has conducted experiments and presented technical papers at NIST (National Institute Standards and Technology) and IMAPS on leak testing techniques and optimization of seam welding processes through statistical DOE methods. He has experience with OLT (Optical Leak Technology) and CHLD (Cumulative Helium Leak Detection). Tom is a Fellow of IMAPS and has a B.S. in Materials Engineering for Lehigh University and a Masters from the University of Utah.

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