Usually, the tests done to evaluate and analyze the reliability of electronic products are called reliability tests. Through reliability tests, the reliability characteristics of electronic products under various environmental conditions can be determined. Provides useful data; may also expose product design, material and process issues.

      1. In the development stage, it is used to expose the defects of all aspects of the trial product, evaluate the reliability of the product, and achieve the predetermined index;

      2. The production stage provides information to monitor the production process;

      3. Determine or accept the reliability of the finalized product;

      4. Expose and analyze the failure laws of products under different environmental and stress conditions, as well as related failure modes and mechanisms;

      5. In order to improve the reliability of products and provide basis for users to choose products, formulate and improve the reliability test plan.

      In general, reliability tests can be divided into five categories: A. Environmental test B. Life test C. Screening test D. Field use test E. Identification test.

      1 Intrinsic reliability.

      Intrinsic reliability is the reliability inherent in a product as it was designed. For component products, the quality of raw materials, manufacturing processes, working parameters, etc. will affect its inherent reliability. For electronic products, its essential properties depend on the complexity of the product. The selection and use of circuits and components. The working parameters, reliability, mechanical structure and manufacturing process of components and other factors. In general, the more complex the circuit and structure, the more components used and the more processing, the lower its inherent reliability.

      2 Use reliability.

       Reliability refers to the impact of use and maintenance personnel on product reliability. Whether the use and maintenance procedures are correct, the selection of equipment is reasonable, whether the operation method is appropriate, and other human factors. Reliability largely depends on the user of the instrument. Proficient and correct operation. Timely maintenance and repair can greatly improve the reliability of product use. Application reliability is directly related to human-machine engineering design.

      3 Adapt to the environment.

      Environmental adaptation refers to the reliability of products, including natural environment, mechanical environment, electromagnetic environment, etc., to improve the environmental adaptability of equipment, mainly by taking various effective protection measures.

      The main reliability factor of electronic devices.

      Generally speaking, the reliability of electronic products depends on the lifespan. The longer the average lifetime of an electronic device, the higher the reliability of the electronic device. However, reliability and life are not the same concept. Electronic products have high reliability, but not necessarily long life, and long life does not necessarily have high reliability, which is related to the use requirements.

      1 natural environment.

      Electronic devices are greatly affected by environmental factors at work, such as temperature, humidity, salt spray, air pressure, altitude, air pollution particles, etc., which will affect the normal operation of electronic components, reduce their electrical performance, and even damage components, causing Fault.

      2 Mechanical structure.

      The mechanical structure design of electronic devices must meet the requirements of use conditions. Strong mechanical vibration or collision will cause mechanical damage and deformation to the equipment, and even cause physical damage or failure of electronic components, making it unable to work normally.

      3 Electromagnetic environment.

      Electromagnetic waves are everywhere in the environment, and electronic products are in contact with electromagnetic signals in space all the time. Affected by the electromagnetic wave signal, the noise of the electronic circuit will become larger and the stability will become worse. If the interference is serious, it may even cause equipment failure or endanger personal safety.

      4 Assembly process.

      In addition to component quality and design factors, the manufacturing process will also directly affect the reliability of the product. The inconsistency of the assembly process will directly affect the firmness of the connection, sealing, environmental corrosion resistance, etc., thus affecting the quality and reliability of electronic products.

      In fact, in addition to the reliability of use, the inherent reliability and environmental adaptability of electronic products are determined by the design and manufacturing process. That is to say, after manufacturing, the main reliability indicators of electronic devices have been determined, and the external environment is only A test of its reliability, therefore, the key to improving the reliability of electronic products is to improve the level of design and manufacturing.