High Temperature Aging Cabinet
High temperature aging cabinet is a type of aging equipment used to remove early failure of non-conforming product parts.
Use of temperature aging cabinet, aging oven:
This test equipment is a test equipment for aviation, automobile, home appliances, scientific research and other fields, which is used to test and determine the parameters and performance of electrical, electronic and other products and materials after temperature environment changes in high temperature, low temperature, alternating between temperature and humidity or constant temperature and humidity.
The chamber of the test equipment is sprayed with steel plate after treatment, and the spray color is optional, generally beige. SUS304 mirror stainless steel is used in the inner room, with a large window tempered glass, real-time observation of internal aging products.
Features of temperature aging cabinet, aging oven:
1. PLC processing industry touch screen programming combination control, balanced temperature control system: aging specimen room temperature rise start the ventilation fan, balance the sample heat, aging cabinet is divided into product area and load area
2. PID+SSR temperature control system: according to the temperature change in the specimen box, the heat of the heating tube is automatically adjusted to achieve the temperature balance, so that the heating heat of the system is equal to its heat loss and achieve the temperature balance control, so it can run stably for a long time; The fluctuation of temperature control is less than ±0.5℃
3. The air transport system is composed of three-phase asynchronous electronic multi-wing wind wheel and wind drum. The wind pressure is large, the wind speed is uniform, and the uniformity of each temperature point is met
4. High precision PT100 platinum resistance for temperature acquisition, high accuracy for temperature acquisition
5. Load control, the load control system provides ON/OFF control and timing control two functional options to meet the different test requirements of the product
(1)ON/OFF function introduction: The switch time, stop time, and cycle times can be set, the test product can be switched according to the setting requirements of the system, the stop cycle control, the aging cycle number reaches the set value, the system will automatically sound and light prompt
(2) Timing control function: the system can set the running time of the test product. When the load starts, the product power supply starts timing. When the actual timing time reaches the time set by the system, the power supply to the product is stopped
6. System operation safety and stability: The use of PLC industrial touch screen control system, stable operation, strong anti-interference, convenient program change, simple line. Perfect alarm protection device (see protection mode), real-time monitoring of the operating status of the system, with the function of automatic maintenance of temperature data during operation, in order to query the temperature historical data when the product is aging, the data can be copied to the computer through the USB interface for analysis (format is EXCEL), with historical data curve display function, It intuitively reflects the temperature change in the product area during the product test, and its curve can be copied to the computer in BMP format through the USB interface, so as to facilitate the operator to make the test product report. The system has the function of fault query, the system will automatically record the alarm situation, when the equipment fails, the software will automatically pop up the alarm screen to remind the cause of the fault and its solution; Stop the power supply to the test product to ensure the safety of the test product and the equipment itself, and record the fault situation and occurrence time for future maintenance.
Semiconductor Chip-Car Gauge Chip
A new energy vehicle is divided into several systems, MCU belongs to the body control and vehicle system, is one of the most important systems.
MCU chips are divided into 5 levels: consumer, industrial, vehicle gauge, QJ, GJ. Among them, the car gauge chip is the current vane product. So what does the car gauge chip mean? From the name, it can be seen that the car gauge chip is the chip used in the car. Different from ordinary consumer and industrial chips, the reliability and stability of the car gauge chip is extremely important, so as to ensure the safety of the car at work.
The certification standard of the car gauge level chip is AEC-Q100, which contains four temperature levels, the smaller the number, the higher the level, the higher the requirements for the chip.
It is precisely because the requirements of the car gauge chip are so high, it is necessary to carry out a strict Burn In test before the factory, BI test requires the use of professional BI oven, our BI oven can meet the BI test of today's car gauge chip.
Connect the EMS system, so that each batch of baked chips can be traced at any time. High temperature and low temperature vacuum anaerobic environment, real-time monitoring of baking curve to ensure baking safety and effect.
Burn-in Oven
Burn-in is an electrical stress test that employs voltage and temperature to accelerate the electrical failure of a device. Burn-in essentially simulates the operating life of the device, since the electrical excitation applied during burn-in may mirror the worst-case bias that the device will be subjected to in the course of its useable life. Depending on the burn-in duration used, the reliability information obtained may pertain to the device's early life or its wear-out. Burn-in may be used as a reliability monitor or as a production screen to weed out potential infant mortalities from the lot.
Burn-in is usually done at 125 deg C, with electrical excitation applied to the samples. The burn-in process is facilitated by using burn-in boards (see Fig. 1) where the samples are loaded. These burn-in boards are then inserted into the burn-in oven (see Fig. 2), which supplies the necessary voltages to the samples while maintaining the oven temperature at 125 deg C. The electrical bias applied may either be static or dynamic, depending on the failure mechanism being accelerated.
Figure 1. Photo of Bare and Socket-populated Burn-in Boards
The operating life cycle distribution of a population of devices may be modeled as a bath tub curve, if the failures are plotted on the y-axis against the operating life in the x-axis. The bath tub curve shows that the highest failure rates experienced by a population of devices occur during the early stage of the life cycle, or early life, and during the wear-out period of the life cycle. Between the early life and wear-out stages is a long period wherein the devices fail very sparingly.
Figure 2. Burn-in ovens
Early life failure (ELF) monitor burn-in, as the name implies, is performed to screen out potential early life failures. It is conducted for a duration of 168 hours or less, and normally for only 48 hours. Electrical failures after ELF monitor burn-in are known as early life failures or infant mortality, which means that these units will fail prematurely if they were used in their normal operation.
High Temperature Operating Life (HTOL) Test is the opposite of ELF monitor burn-in, testing the reliability of the samples in their wear-out phase. HTOL is conducted for a duration of 1000 hours, with intermediate read points at 168 H and 500 H.
Although the electrical excitation applied to the samples are often defined in terms of voltages, failure mechanisms accelerated by current (such as electromigration) and electric fields (such as dielectric rupture) are understandably accelerated by burn-in as well.
Lab Ovens and Lab Furnaces
Design with sample protection as the primary goal
Lab ovens are an indispensable utility for your daily workflow, from simple glassware drying to very complex temperature-controlled heating applications. Our portfolio of heating and drying ovens provides temperature stability and reproducibility for all your application needs. LABCOMPANION heating and drying ovens are designed with sample protection as a primary goal, contributing to superior efficiency, safety and ease of use.
Understand natural and mechanical convection
Principle of natural convection:
In a natural convection oven, hot air flows from bottom to bottom, so that the temperature is evenly distributed (see figure above). No fan actively blows the air inside the box. The advantage of this technology is ultra-low air turbulence, which allows for mild drying and heating.
Principle of mechanical convection:
In a mechanical convection (forced air drive) oven, an integrated fan actively drives the air inside the oven to achieve uniform temperature distribution throughout the chamber (see figure above). A major advantage is excellent temperature uniformity, which enables reproducible results in applications such as material testing, as well as for drying solutions with very demanding temperature requirements. Another advantage is that the drying rate is much faster than natural convection. After opening the door, the temperature in the mechanical convection oven will be restored to the set temperature level more quickly.
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