Performing HALT Testing

HALT - Highly Accelerated Life Test

HALT tests are proven methods developed by Qualmark to find design defects and weaknesses in electronic and electromechanical assemblies so that a more reliable product can be released to market in rapid order.

Specially engineered systems deliver stresses of temperature, rapid thermal cycling, and random, tri-axial vibration which are used to rapidly reveal design weaknesses and product problems.

Stresses are delivered in an ordered sequence:

  • Thermal Step Stress
    1. Cold Step Stress
    2. Hot Step Stress
  • Rapid Thermal Transition Cycling
  • Vibration Step Stress
  • Combined Environment
    1. Rapid Thermal Transition Cycling  and
    2. Vibration Step Stress

At each level of applied stress, functional testing is performed on the product sample to evaluate its operation.  When a failure occurs, the failure mode and stress level is recorded, the failure location is isolated, and the root cause of the failure is determined. A temporary fix is implemented and HALT testing is continued to uncover additional failures. As the failure modes are found and eliminated, limits are pushed further and further out, maximizing margins and increasing the product’s life and reliability.

halt highly accelerated life test flow diagram halt

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