October 30, 2020
Testing is an important process and link. Without testing, the reliability of various components cannot be effectively guaranteed. In order to enhance everyone's understanding of testing knowledge, this article will introduce copper clad laminate testing technology.
1. Copper-clad rice detection technology
As a technology, copper clad laminate testing should include the following.
① Directly testing the nature of production and service, such as obtaining physical and chemical parameters that characterize a certain characteristic of semi-finished products and finished products through testing. Regarding the detection of the performance parameters of the semi-finished copper clad laminate, it has been introduced in the previous chapters. This chapter only introduces the detection of the performance of the finished product.
②Research the relationship between the structure of the material, the manufacturing process, the environment, etc. and the performance of the product through testing, and determine the law of change.
③Research and test new equipment, new methods, new technologies, and continuously improve the level of testing technology.
2. The detection technology of copper clad laminate is the guarantee condition for the progress of copper clad rice technology and the quality of crystal production
The development of my country's copper clad laminate industry, the research and development of a relatively complete variety, and the improvement of the quality of copper clad laminates must be guaranteed by corresponding testing technical conditions. Although the quality characteristics of copper clad laminates are formed through scientific research and manufacturing processes, rather than determined by testing, they can be clearly displayed only through scientific testing. Rapid, accurate, and timely detection is the eyes of scientific research and production, which not only shows the quality characteristics of the product, but also controls the process through detection and explores the relationship between material and product performance, and the relationship between product performance and external conditions. Determine the long-term reliability of materials or products, etc. In addition, in order to assess product quality levels, carry out industry quality appraisal, implement quality supervision and spot checks, implement product license systems, and conduct quality certification and safety certification, etc., necessary testing conditions are required.
The large and powerful companies in my country's copper clad laminate industry have established a complete inspection system to ensure the smooth progress of research and development, production and operation. But as far as the whole industry is concerned, according to the three major content requirements of copper clad laminate testing technology, there is a big gap with the international advanced level, and sometimes it even becomes one of the restrictive factors of copper clad laminate research and development. The whole industry needs to make continuous efforts to improve.
3. Introduction to the quality characteristics of copper clad laminates
The quality characteristics of copper clad laminates refer to those natural attributes that it can meet the needs of users. In summary, there are the following quality characteristics:
①Electrical characteristics such as high insulation of the substrate, excellent dielectric properties, resistance to electric corrosion, electric field strength, good conductivity of copper foil, etc.;
②Mechanical properties such as the adhesion of copper foil to the substrate, the mechanical strength of the copper clad laminate (such as bending and punching characteristics), dimensional stability, etc.;
③Chemical characteristics such as the flammability, heat resistance, solderability, glass transition temperature, linear expansion coefficient of copper clad laminates, etc.;
④Environmental resistance such as toxicity resistance, water absorption, retort resistance, etc.;
⑤ General performance such as physical properties such as appearance and size.
Some of the quality characteristics of the product can be directly and quantitatively expressed, such as most of the electrical and mechanical characteristics of copper clad laminates; while some are directly quantitatively expressed by the meta method, then some substitute indicators shall be used indirectly and quantitatively expressed, such as heat resistance. Commonly used copper clad laminates are tested by measuring their electrical and mechanical characteristics after a certain period of time, a certain temperature or a certain special environment.
All these direct and indirect index items constitute an index system for measuring product characteristics. In some standards, many items in the product quality index system are divided into three major categories: critical, important, and minor. It should be made clear that the so-called "secondary" is not necessary or necessary. In general, indicators that are not necessary and necessary should be removed from the indicator system.
4. Copper clad laminate testing technology and product standards
CCL product standard is an important standard in the technical standard of copper clad laminate. It is for mutual comparability within a certain range, defines the technical indicators of each item in the quality characteristic index system, specifies the methods for testing these items, testing conditions, equipment, tools, measuring tools and test methods, as well as sampling, sample preparation, etc. . Therefore, product standards are the basis for testing copper clad laminates. If there is no standard, there will be no testing. It is the professional ethics of the inspectors to implement the product standards without compromise.
In my country, product standards are divided into three levels: national standards, ministerial standards and corporate standards. Some countries have three levels: national standards, industry association standards, and enterprise standards. Sometimes in order to ensure the high quality and reliability of military products, national military standards are also formulated.
All personnel engaged in the development, production, and inspection of copper clad laminates should work hard to continuously improve the detection technology level of copper clad laminates (including standard levels, testing techniques, testing methods, etc.).