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Reliability Testing Service

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HALT

Equipment
Highly Accelerated Life Test

Highly Accelerated Life Test

Highly Accelerated Life Test (HALT) is a method that repeatedly induces the failure of a product by applying stress for a very short time (3 to 5 days) in order to analyse the cause of the failures and provide improvements. It is a useful test for quickly identifying vulnerabilities during the product development phase.

Introduction

A tolerance test that accelerates a products failure by putting it under more stressful conditions than its conditions of use

Typical HALT Testing Procedures

Application
  • 01

    Low Temperature Step Stress

    Analysis of Product Vulnerabilities in Low Temperature Environments

    A method used to determine the lower operating limit (LOL) and lower destruction limit (LDL) of a product while gradually lowering the temperature

  • 02

    High Temperature Step Stress

    Analysis of Product Vulnerabilities in High Temperature Environments

    A method used to determine the upper operating limit (UOL) and upper destruction limit (UDL) of the product while increasing the temperature step by step

  • 03

    Rapid Thermal Transistion

    Vulnerability analysis of rapid temperature changing environments

    Classifying faults caused by differences in thermal expansion coefficients of internal and external components in environments where temperatures alternate within the upper and lower operating temperatures

  • 04

    Vibration Step Stress

    Vulnerability Analysis of Products under Vibration

    A method used to assess the parts coupling and internal vulnerability in a 6-axis free vibration environment, and to determine the vibration operating limit (VOL) and the vibration destruction limit (VDL).

  • 05

    Combined Environmental Stress

    Vulnerability Analysis of Multiple Stress Environments
    (Heat, Shock, and Vibration)

    Checking potential failure undetected under single stress(temperature, vibration, etc.)

However!!, HALT is not a standardized testing method
The product must be put under a variety of stresses to identify the optimal stress environment for detecting faults.

The Equipment

  • USE

    A tolerance test that accelerates a products failure by putting it under more stressful conditions than its conditions of use

  • Equipment Spec

    System Name : HALT

    System Model : Typhoon 4.0

    Temp Range : -100 ℃ ~ 200 ℃

    Vibration Range : 50 Grms, 5,000 Hz

    Ramp rate : Max 60℃ /
    min (85 ℃ ~ -65 ℃)

    Vibration Table : 1219 x 1219

    Vibration Table Product Capacity : 282 kg

    Vendor : Qualmark

Equipment

The test is used as a criteria to improve the reliability of electronic units or systems in automobiles by conducting accelerated stress tests, and secures rigid and efficient quality and reliability results for the product being developed.

  • 01.

    Check system stability within product specifications

  • 02.

    Check the design margin of the product

  • 03.

    Evaluation of product performance and characteristics against external environmental stress such as temperature and vibration

  • 04.

    Evaluation of product performance and characteristics of non-environmental stress such as power voltage fluctuations and loads

  • 05.

    Early verification and improvement of quality and reliability through early detection and improvement of vulnerabilities

Testing Procedures [Applied Spec : ES90000-05]
Low Temperature Step Stress Test
The purpose of this test is to improve the product by detecting the product's lower operating limit (LOL),
lower destruction limit (LDL), and its abnormalities and characteristic changes under low temperature stress.
High Temperature Step Stress Test
The purpose of this test is to improve the product by detecting the product's upper operating limit (UOL),
upper destruction limit (UDL), and its abnormalities and characteristic changes under high temperature stress.
Rapid Thermal Transition Test
The amplifier's maximum linear output of 1dB gain compression point and
the accumulated power of P3dB can be measured more accurately by running the automatic control program.
Noise Figure
Noise Index (NF) is an indicator of how much noise has been added as
a signal passes through a system or circuit block. High-performance instruments are used for more accurate testing.

HALT Evaluation Procedure

Appendix

SET-UP

Example

HALT Example

Appendix

Door Controller

Head Lamp

Rear Lamp

Heated Seat

Power Seat

Center Fascia

Semiconductor SSD