Reason analysis of crystal oscillator stop vibration

In the event of something is to be divided into two, crystal oscillator is no exception, should be analyzed from the internal and external causes of different angles. Next, we analyze the crystal oscillator stop vibration by internal and external factors. There are many engineers in the encounter, crystal oscillator in the circuit board, while […]

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Summary of some inspection items in PCB design

Data input stage 1. Whether the data received in the process are complete (including schematic diagram, *. BRD file, material list, PCB design description, PCB design or change requirements, standardization requirements description, process design description file) 2. Confirm that the PCB template is up to date 3. Confirm that the position of the positioner of […]

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How to prevent copper surface oxidation in PCB production

1、 Preface At present, in the production process of double-sided and multi-layer PCB, the oxidation problem of copper layer on the surface and in the hole (from the hole) seriously affects the production quality of pattern transfer and pattern electroplating; on the other hand, the increase of AOI scanning false points caused by oxidation of […]

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Why do most circuit boards choose green solder resist ink

Green color is solder mask ink, which is mainly composed of resin, talcum powder and pigment. At present, the most famous ones in the market are Taiyo of Japan, South Asia resin of Taiwan, Changxing chemical industry of Taiwan, yongshengtai ink of Taiwan, etc. the price is generally 60-120 yuan / kg. Of course, there […]

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How to use Protel DXP software to design PCB

Protel DXP is the first board level design system that integrates all design tools. Electronic designers can implement their own design methods from the initial project module planning to the final production data. Protel DXP runs on an optimized design browser platform and has all the advanced design features of today. It can handle all […]

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Several methods of BNC space occupying design

Today, more and more video devices are operating at Gigabit rates, and they are interconnected through relatively large coaxial BNC connectors. Although these connectors are generally of good quality, their performance in the device depends on how well they are mounted on the PCB. Non optimal design of connector space occupation will lead to impedance […]

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Analysis of PCB wet process surface treatment

1. Abrasives abrasive, brush material Various materials used for grinding and brushing the copper surface before cleaning the plate surface, such as polymer nonwovens, or nonwovens mixed with emery, or various types of sand materials, and pumice powder However, the powder of this kind of brush material mixed with sand will often be implanted on […]

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Skills and methods of circuit board concurrent design

Using the latest developed software technology, we can complete efficient parallel circuit board design. This new technology enables multiple designers, multiple processes and different kinds of tools to work in the same design database at the same time, and can significantly improve the design productivity. Different from the traditional method of dividing the design into […]

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