Highly Accelerated Stress Test – HAST

A Highly Accelerated Stress Test (HAST), which combines high temperature, high humidity, pressure, and time to assess acomponent's dependability in challenging conditions, is an essential component of environmental testing. The pressure cooker test (PCT) or unsaturated pressure cooker test (USPCT) are other names for HAST. For customers in the USA and other countries, Infinita Lab offers the best HAST. ... Read More

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    Highly Accelerated Stress Test – HAST Testing Services

    A highly accelerated stress test (HAST) is an essential part of environmental testing that combines high temperature, high humidity, pressure, and time to test a component’s reliability under harsh environments. HAST is an efficient and faster alternative to traditional temperature-humidity testing for testing moisture penetration in semiconductors, thin-film resistors, solar panels, and pharmaceutical products to reveal corrosion failures due to packaging, materials, seals, and joints. A higher amount of stress and pressure better simulates the effects of humidity and temperature in the laboratory and helps predict component failures within days. HAST testing is also employed in transportation, packaging, and shelf-life studies of products. HAST tests under the same temperature, humidity, and pressure variables are performed in testing labs with voltage bias (BHAST) to accelerate moisture penetration and related induced failures within the device or product.

    Empirically, the acceleration factor for high humidity is calculated as:

    AFH = econst (RHsղ-RHoղ)

    Where,

    const – Value that normally ranges from 0.1 to 0.15

    RHs – Stressed humidity

    RHo – Operating environment humidity

    ղ – Empirically derived constant (usually 1 < n < 5)

    The acceleration factor for high temperatures is calculated as follows:

    AFT = e(Ea/k)(1/To-1/Ts)

    Where, 

    Ea – Activation energy for the temperature induced failure

    k – Boltzmann constant

    To – Operating temperature in Kelvin

    Ts – Stressed temperature

    Consequently, the overall acceleration factor for the unbiased HAST testing is:

    AFHAST = AFH * AFT

    In HAST, the samples are put inside a HAST board that are able to withstand severe test conditions. Owing to their capability to tolerate the harsh HAST conditions, the HAST boards are quite expensive. 

    The HAST test, which is a faster version of the standard non-condensing THB (Temperature Humidity Bias) test, has the benefit of utilising greater temperatures (up to 149°C) and higher pressures to hasten temperature and moisture-induced failures in around one-tenth the time of THB. The standard parameters for HAST and BHAST testing are 130°C and 85% RH, but they can change as per each test requirement.

    Our testing labs are well equipped to carry out Highly Accelerated Stress Test (HAST) and provide the best results to our clients based in the USA and other parts of the world. We at Infinita Lab perform not only routine tests, but also custom tests designed in our testing labs as per the client’s specific requirements.

    Video 01: HAST Accelerated Aging Test Chamber

    Testing Parameters in Highly Accelerated Stress Test (HAST)

    • (dry) High temperature 130C, RH 85%, pressure 33.3 psia
    • (wet) High temperature 110C, RH 35%, pressure 17.7 psia

    Highly Accelerated Stress Test (HAST) Common Uses

    • Improve product reliability
    • Improve corrosion resistance of products
    • Predict heat and moisture induced failure modes

    Industries using Highly Accelerated Stress Test (HAST)

    • Electronics
    • Semiconductors
    • Solar Energy
    • Pharmaceuticals
    • Space Applications

    Highly Accelerated Stress Test (HAST) Laboratories

    • Oneida Research Services
    • Element Material Technology
    • Delserro Engineering Solutions
    • Tektronix Inc

    More Details

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      FAQs on Highly Accelerated Stress Test – HAST

      Where can I get HAST of products done?

      We at Infinita Lab provide environmental tests as per the requirements of our clients. HAST testing services are used to measure the ability of materials to function under harsh environmental conditions.

      How much does a HAST cost?

       HAST covers various tests that measure the ability of materials to function under stressors. The cost of a test depends on the type of test and the industry. For instance, HAST for boards starts from $840 for 96 hours.

      What are highly accelerated stress tests (HAST)?

      HAST involves the application of extreme stress for a short duration instead of low stress for a long duration (which happens in natural conditions) to observe the resistance of materials to these stressors. Usually, HAST combines high temperature, humidity, and pressure to test a component’s reliability under harsh environments.

      What are the uses of HAST?

      HAST testing is used for determining the resistance of materials to harsh environmental conditions. It is a more efficient and faster alternative to traditional temperature-humidity tests. It determines moisture penetration in semiconductors, thin-film resistors, and solar panels. It reveals corrosion failures resulting from packaging, seals, and joints. HAST testing is also used in transportation, packaging, and shelf-life studies of products.

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