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JESD22-A118B test method is mainly applicable to moisture-proof prevention prevention Nature assessment and durability tests can be used as replacement of non -biased high -pressure cooking test. The sample is similar to Jesd22-A101 steady-state temperature, humidity and deviation life test similar to Jesd22-A101, but the temperature is high. For the temperature limit specified in this procedure, the test usually generates the same failure mechanism as the 85 ° C/85%RH steady -state humidity life test, but if you consider the higher temperature, you must pay attention because it may be because it may be because it may be because it may be because it may be noticeable because it may be noticeable. Generate an unrealistic failure mechanism. The use of non -condensed environments can avoid many irrelevant external faults, such as leakage or lead corrosion between PIN's feet. However, because the absorbed water usually reduces the glassization transition temperature of most polymer materials, the combination of high humidity and high temperature (u003e TG) may cause unrealistic materials. Be careful, you need to be cautious.
1. Purpose
JESD22-A118b test method is mainly applicable Equipment of high pressure cooking test. The sample is similar to Jesd22-A101 steady-state temperature, humidity and deviation life test similar to Jesd22-A101, but the temperature is high. For the temperature limit specified in this procedure, the test usually generates the same failure mechanism as the 85 ° C/85%RH steady -state humidity life test, but if you consider the higher temperature, you must pay attention because it may be because it may be because it may be because it may be because it may be noticeable because it may be noticeable. Generate an unrealistic failure mechanism. The use of non -condensed environments can avoid many irrelevant external faults, such as leakage or lead corrosion between PIN's feet. However, because the absorbed water usually reduces the glassization transition temperature of most polymer materials, the combination of high humidity and high temperature (u003e TG) may cause unrealistic materials. Be careful, you need to be cautious.
HAST test method to evaluate the reliability method of non -seal packaging solid devices in a humid environment. This is a high -degree acceleration test. Under the conditions of exclusive condensation conditions, use temperature and humidity to accelerate water vapor through external protection materials
(packaging material or sealing parts) or along external protection materials and metal conductors The interface penetration is penetrated. Poor pressure is not adopted in this trial to ensure that the failure mechanism that may be covered with partial pressure can be revealed such as the corrosion of the electric puppet. This test is used to identify the failure mechanism inside the packaging and is destructive.
2. Test equipment
The test requires a hast to accelerate the aging test box . This test box can maintain the prescribed temperature and relative humidity in the process of rising and decline in the specified test conditions.
2.1 calibration record
It is recommended to perform permanent records of the temperature distribution of each test cycle in order to verify the stress conditions. The calibration record should be verified that under the conditions of the high heat quality load, the device avoids condensation at the measured device (DUT) at a temperature of 50 ° C during the warming and cooling process. The calibration record should be verified. For the stable conditions and the heating mass load, the test conditions are kept within the tolerance range specified in Table 1.
2.2 Pressure device
The test sample must be placed in the HAST test box to minimize the temperature gradient. The distance between the test sample and the surface of the inner cavity must not be less than 3cm, and the ring is affected by the heater directly radiating heating. If the sample is installed on the test board, the direction of the test board should be reduced as much as possible.
2.3 ionic pollution
hast accelerated aging test box At this time, you must be careful to minimize the release of pollutants, and the amount of ember reduction is reduced due to corrosion and other mechanisms. The ion pollution of the test device should be controlled to avoid the experimental affected.
2.4 distillation or deodorization
The resistivity of the resistance of 1mq-cm should be used by the use room temperature.
3. Test conditionsThe test conditions include temperature, relative humidity and duration.
Equipment use: Unsaturated high pressure
Mainly testing the moisture capacity of semiconductor packaging. The product for testing is tested at rigorous temperature, temperature and pressure. The moisture will be along the colloid or colloid and the wire frame. The interface seepage person's packaging body, the common fault method is a disconnection caused by the corrosion of active metallicized areas , or short circuit caused by pollution between the packaging body pins. The penetration between between is completed by continuous pressure under the set temperature and humidity conditions. 
MachineryStructure:
1. Round -type inner box, stainless steel round test inner box structure, which meets industrial safety container standards, can be given the phenomenon of exposed water in the defense test.
2. Circle inner biliary, stainless steel arc inner bilots design, which can avoid the direct shock of the steam overheating.
3. Copper tube+speaker mouth, precision design, good gas tightness, low water consumption.4. Dedicated Packing, Material: High temperature and high -temperature superstructure foaming. When the pressure of the inner box is greater, Packing will have anti -pressure to make it close to the box. It is completely different from traditional squeezing, which can extend the life of Packing.
5. The critical point Limit is automatically protected. In a dry state.
6. The water tank adopts a 16L large -capacity water tank and placed at the bottom of the box. Broken; at the end of the test, the device will automatically remove the pressure.
Power supply conditions:
AC220V fire line+zero line+protection ground line. Users are required to configure the air or power switch of the corresponding capacity at the installation site, and this switch must be used independently for this device.
Safety protection device:
Test the ultra -temperature ultra -pressure protection during the test, the internal high temperature protection inside the instrument, the instrument of the first stage, the instrument of the instrument, the instrument of the instrument, and the ultra -high temperature protection. In the second stage of the instrument in the instrument of the humidifier of the humidifier, high pressure protection, water tank water deficiency alarm power off, the second stage of humidifying pipe limit temperature protection, second stage of ultra -high pressure protection, emergency pressure protection in the third stage, manual pressure leakage protection , Automatic pressure and so on.
