Date：2021-12-27 14:03:37

The electrical performance of electronic and electrical equipment directly affects the safe and reliable operation of the whole electrical system. In order to ensure the safety of equipment, all electronic and electrical equipment must pass various type tests in the production and manufacturing process to ensure the safety of electrical environment. The electrical performance test includes the basic parameter test of conductor or insulation quality, such as conductor resistance, insulation resistance, correct value of dielectric loss angle, capacitance, etc. The higher the working voltage of the cable, the stricter the requirements for its electrical performance. View >>

Date：2021-12-27 13:57:58

Some engineers probably have no problem burning chips in the R & D and testing stage, but once they enter mass production, the production department will frequently feed back the poor burning of chips. What is the reason? Can't the chip burning program burn in? The following mainly introduces the cause analysis of poor burning. View >>

Date：2021-12-27 13:53:06

Online burning, which integrates burning and testing, has attracted more and more attention. In order to speed up the burning efficiency, the burning tooling or fixture is often made, and the longer the wiring is required between the tooling, fixture and programmer. The longer the wiring is, the faster the signal attenuation is, and the burning defect rate also increases. This paper will introduce several measures to improve the instability of chip burning. View >>

Date：2021-12-24 11:52:00

Chip reliability test is mainly divided into two major items: environmental test and life test. The environmental test includes mechanical test (vibration test, impact test, centrifugal acceleration test, outgoing line tensile strength test and outgoing line bending test), outgoing line weldability test, temperature test (low temperature, high temperature and temperature alternating test) Damp heat test (constant humidity and alternating damp heat), special test (salt spray test, mold test, low pressure test, electrostatic resistance test, ultra-high vacuum test and nuclear radiation test); The life test includes long-term life test (long-term storage life and long-term working life) and accelerated life test (constant stress accelerated life, step stress accelerated life and sequential stress accelerated life), some of which can be done selectively. View >>

Date：2021-12-24 11:50:58

The chip is generally not broken. If it is broken, the most common is breakdown damage. You can use a multimeter to measure the resistance or voltage of the power supply end of the chip to the ground. Generally, if it is within tens of ohms or the power supply voltage is lower than the normal value, most of it can be regarded as breakdown damage. You can disconnect the power supply end and measure whether the power supply is normal. If the measured resistance is large, it is likely that other ports are damaged. You can also measure other ports one by one. See if there is a port shorted to ground. View >>

Date：2021-12-24 11:50:54

Xray detection welding digital real-time imaging is a high-tech product mainly composed of high-frequency mobile (fixed) X-ray flaw detector, high-resolution industrial TV system, computer image processing system, mechanical and electrical system and ray protection system. It mainly relies on X-ray to penetrate the object and store the characteristics of the image, so as to carry out nondestructive evaluation on the interior of the object. Through welding experiment verification (manual welding, automatic welding, argon arc welding), the weld can be divided into silver white, golden yellow, multicolored (golden yellow + blue), blue, dark blue, gray black (shiny), dead black and gray, etc. Welding color represents welding quality, which is closely related to welding process parameters and welder's technical level. View >>

Date：2021-12-23 11:12:03

As we all know, in the process of industrial manufacturing, there will always be various production defects, which is inevitable. In the past, most product inspection was carried out with the naked eye. With the development of machine vision technology, using machine instead of human eye inspection has become the development trend in the future. In industrial production, using machine vision detection equipment, the system has measurement function and can automatically measure the appearance dimensions of products, such as outline, aperture, height, area and so on. View >>

Date：2021-12-23 11:05:22

Machine vision is an interdisciplinary subject involving artificial intelligence, neurobiology, psychophysics, computer science, image processing, pattern recognition and many other fields. Machine vision mainly uses computer to simulate human visual function, extract information from the image of objective things, process and understand it, and finally use it for actual detection, measurement and control. For example, in the automatic manufacturing industry, using machine vision to measure and detect various dimensional parameters of workpieces, such as length measurement, circle measurement, angle measurement, arc measurement and area measurement, can not only obtain the dimensional parameters of online products, but also make online real-time judgment and sorting of products, which is widely used. View >>

Date：2021-12-22 14:07:19

With the continuous development of integrated circuit technology, the characteristic size of the chip becomes smaller and smaller, and the structure of the device becomes more and more complex. The corresponding chip process diagnosis, failure analysis and device micromachining become more and more difficult. The traditional analysis methods have been difficult to meet the needs of the development of integrated circuit devices to deep submicron and nano technology. View >>

Date：2021-12-22 14:04:41

For PCBA industry, the incoming inspection of components is the first barrier to be guarded by the whole quality management, and it is also a very important link. By strictly controlling the incoming links, it has an important impact on the final product quality. If the standards of various devices are different, the supplier's specifications shall be consulted before incoming materials. The main purpose is to prevent the outflow of defective products from adversely affecting the company's reputation and reputation, and the problems of repair, rework and return of defective products will bring economic losses to the company. View >>