Liquid Environmental Stress Screening

Abstract

This report describes a method of performing Environmental Stress Screening in an inert fluid. Because the liquid has a high dielectric strength, the items being screened can be energized and operational while submerged. Transmitting vibrations through the liquid to the item being screened permits screening without the use of fixtures, and the liquid's high heat capacity allows very rapid temperature changes, either by pumping hot or cold liquid from remote reservoirs or by moving the device from a hot tank to a cold tank. A prototype screening system has been built at NRaD, and faults induced in a small (47 pieces) lot of printed wiring boards have been detected.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1992
Accession Number
ADA252282

Entities

People

  • J. L. Walker

Organizations

  • Naval Command, Control and Ocean Surveillance Center

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Accelerometers
  • Amplifiers
  • Circuit Boards
  • Climate Change
  • Control Systems
  • Ecology
  • Electronic Equipment
  • Frequency
  • Heat Transfer
  • Heat Transfer Coefficients
  • Joints
  • Manufacturing
  • Ocean Surveillance
  • Power Amplifiers
  • Random Vibration
  • Surveillance
  • Thermal Conductivity

Readers

  • Electrical Engineering
  • Hydrologic Risk Analysis and Mitigation.
  • Thermal Physics or Thermal Science.