Electronic product testing: the role and significance of component failure analysis

Date：2021-09-23 16:00:34 Views：1623

Failure analysis is a technology to analyze and study the characteristics and laws of failure phenomena such as fracture, surface damage and deformation of components. It has strong practical significance in improving the quality of components, technical development and improvement, product repair and arbitration of failure accidents. It is an activity to simulate and reproduce the failure phenomenon, find out the causes of component failure and dig out the failure mechanism according to the failure mode and phenomenon through analysis and verification. Methods are divided into destructive analysis, nondestructive analysis, physical analysis, chemical analysis, etc.

Failure mechanism is a physical or chemical process that leads to the failure of parts, components and materials. The inducing factors of this process are internal and external. When studying the failure mechanism, we usually start with the external inducing factors and failure manifestations, and then study the more hidden internal factors. When studying the law of batch failure, mathematical statistical methods are commonly used to form an arrangement diagram or Pareto Diagram representing the relationship between failure mechanism, failure mode or failure position and failure frequency, failure percentage or failure economic loss, so as to find out the main failure mechanism, orientation and position that must be solved first.

Failure and its common forms: when the specified function cannot be completed due to the change of structure and performance of mechanical components, it is called failure. The most common failure forms are mechanical failure, corrosive failure and high temperature failure.

Failure analysis and its significance: failure analysis is a technology to analyze and study the characteristics and laws of failure phenomena such as fracture, surface damage and deformation of components. Significance: failure analysis provides basis for improving product design and material selection, and prevents or reduces fracture accidents; Reliability can also be predicted by failure analysis; It can improve the reputation of mechanical products and play the role of technical feedback.

Function of component failure analysisIn short, it can be summarized as follows:

(1) Find the root causes affecting product reliability, and put forward effective measures to improve design and process.

(2) In terms of process control, screening, accelerated stress test, evaluation and certification, it provides a basis for component manufacturers and quality supervision departments to formulate reasonable and best test methods and specifications.

(3) Provide basis for users to reasonably select components, correctly use components and reliability design of the whole machine.

(4) By distinguishing accidental failure and batch defects, it provides decision-making basis for the use and scrapping of the whole batch of components.

(5) Through the implementation of corrective measures, improve the yield and reliability of product production, and reduce the occurrence of faults during system test and operation. Rongrong.com has relevant information to query.

In the development stage of electronic components, failure analysis can correct errors in design and development and shorten the development cycle; In the production, testing and use stage of electronic components, failure analysis can find out the failure causes of electronic components and the responsible party causing the failure of electronic components. According to the results of failure analysis, the component manufacturer improves the design and production process of components, the user of components improves the circuit board design, improves the testing, test conditions and procedures of components or the whole machine, and even replaces unqualified component suppliers on this basis. Therefore, failure analysis is of great significance to speed up the development of electronic components and improve the yield and reliability of components and the whole machine.

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