Overview of the hottest electronic reliability eng

2022-09-23
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Overview of electronic reliability engineering

electronic reliability engineering is a system engineering to improve product quality and reliability and reduce hardware production failure rate and market failure rate

are you worried about the low direct production rate of electronic products, and are you at a loss for the high market repair rate? According to the analysis of the industry, more than 60% of production failures are caused by device failure, and more than 70% of market repairs are also caused by device failure. However, most companies have not adopted systematic electronic reliability engineering methods to solve this problem, resulting in low efficiency and low reliability of product quality

in fact, according to the electronic reliability engineering method of the system, it is possible to achieve the industry-leading product quality by selecting appropriate devices, effectively controlling the quality of devices, reasonably applying devices, and carrying out reliability design

electronic reliability engineering includes five aspects:

first, ensure the basic reliability of the materials constituting the product through correct type selection and certification

material selection and certification is a product engineering and an important part of hardware development activities. Once a material is selected, its quality, cost and procurability have basically been solidified by 60%. The effect of a series of improvement and guarantee strategies in the later stage can only account for 40%, and the material selection has a significant impact. How to determine the specifications of materials, how to identify the advantages and disadvantages of materials from different manufacturers, how to authenticate material manufacturers, how to monitor the quality fluctuations of material manufacturers, these special technologies have been studied by professional teams in international leading companies, and there are systematic processes to ensure the selection of materials. At present, domestic manufacturers are generally weak, so from the beginning of material selection, the product quality has opened a gap with industry-leading companies, It can be said that we lost at the starting line

second, ensure application reliability through correct and reasonable design methods

there are 14 commonly used reliability design methods. In the process of product development, these aspects should be considered, including doing corresponding simulation analysis, in order to ensure the reliability of the designed product

reliability prediction

FMEA

reliability index demonstration, allocation and redundancy design

electrical stress protection design

ESD protection design

tolerance analysis

derating design

derating design

thermal analysis and design

signal integrity analysis

EMC design

safety design

environmental adaptability design

life and maintainability design

a leading international company, These design methods are guaranteed by professional teams. In order to meet the needs of domestic enterprises, for each design method, Shenzhen yiruilai company has experts responsible for studying and tracking the latest progress in the industry, with rich practical experience

III. ensure not to introduce damage to devices in the process of processing and maintenance

in the process of production and processing, the most important factors affecting reliability are ESD, MSD and solder joint reliability. At present, the control technology of these three aspects is relatively mature, and there are corresponding international standards, but many domestic manufacturers are not perfect, such as what is the ESD control level of the product line, and how many levels of moisture sensitive devices can MSD control be achieved, How are the main factors affecting the reliability of solder joints controlled? Reliability problems caused by poor control of MSD. According to the current design specification of power type 3-element material 523, the price is 155000-160000 yuan/ton, and a large number of outbreaks often occur after the product reaches the hands of users for more than half a year. ESD damage also has a great impact on the long-term reliability of devices. Therefore, how to control the processing process and ensure that damage to devices is not introduced needs attention. In the process of product maintenance, reliability should also be considered to avoid introducing damage to the product

IV. failure analysis

through the failure analysis of devices in development, testing, small batch trial production, mass production stage and user site, find the root causes of failure and improvement measures, and timely correct and prevent the occurrence of failure. The earlier the problem is found, the lower the cost of solving the problem is. Therefore, even countries emerging in the process of development and commissioning are seeking a new round of scientific and technological and industrial upgrading to break through the failure of individual devices, it is necessary to conduct a thorough failure analysis, clarify the failure mechanism, and then take corresponding solutions. 0

v. process assurance

electronic product reliability engineering is a very rigorous system engineering, which requires efficient and clear processes to ensure. There are three main reliability processes:

1 the process of selecting reliable materials, including material selection, material certification. Supplier certification is mainly used for static load, dynamic load performance test and dynamic load fatigue life test of parts and large structural parts, supplier quality control, etc

2 the reliability design process in product development ensures the use of the 14 methods mentioned above and defines the review requirements, so as to ensure the reliability of products through reliability design

3 fracas process, through the analysis and processing of fault data, find out abnormal problems, start root cause analysis, find solutions and preventive measures, so that all problems can be closed-loop, so as to ensure the reliability of products. (end)

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