VACUUM DE-GASSING OF ENCAPSULANTS,

Abstract

Processes and techniques for the operation of the Vacuum Impregnator for de-gassing the resins used for encapsulating electronic modules is reported. A total of 225 distinct tests were run using 9 different resin formulations. Resin types in cluded epoxies and polyurethanes. Two factors, pre-mix temperature of ingredients and appli cation of vacuum were varied. The resulting samples were evaluated for bubbles, cracks, crazing and hardness. Application of vacuum to batches prior to casting and curing proved effective for de-gassing encapsulating materials for most of the formulations tested. Taken over all the results varied widely, ranging from perfect to unacceptable. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1961
Accession Number
AD0412282

Entities

People

  • A. Defelice

Organizations

  • Lockheed Martin Missiles and Space

Tags

DTIC Thesaurus Topics

  • Biomedical And Dental Materials
  • Composite Materials
  • Films
  • Hardness
  • Macromolecules
  • Materials
  • Molecules
  • Plastics
  • Polyimide Resins
  • Polymeric Films
  • Polymers
  • Polyurethanes
  • Resins
  • Synthetic Polymers

Readers

  • Mycotoxin ecology in Amazonian ecosystems.
  • Polymer Science and Engineering.

Technology Areas

  • Microelectronics