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Explain in detail three common drill holes in printed circui...
Through hole (via), the copper foil circuit between the conductive patterns in different layers of the circuit board is conducted or connected by this kind of hole, but the copper plated hole of component leg or other reinforcement material cannot be inserted. Printed circuit board (PCB) is formed by stacking many copper foil layers. The reason why copper foils can't communicate with each other is that each layer of copper foil is covered with an...
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How to remove double sided circuit board_ Disassembly and so...
comparison of these methods is given in Table 1.Most of the simple methods for dismantling electronic components (including advanced pneumatic gun) are only suitable for single panel, but not for double-sided panel and multi panel.
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What is the difference between circuit design and circuit bo...
Starting from today, let's introduce the introduction of circuit board design. The purpose is to let everyone design some simple circuit boards by themselves. At the same time, we can review the omission of knowledge in the design.As for the expert level, you can skip my article. Because of the limited time every day, I hope you can forgive me.
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The welding process of printed circuit board and the method ...
Master the welding temperature and time. During welding, there should be enough heat and temperature. If the temperature is too low, the solder fluidity is poor, it is easy to solidify and form false soldering; if the temperature is too high, the solder will flow, the solder joint is not easy to store tin, the flux decomposition speed is accelerated, the metal surface oxidation is accelerated, and the solder pad on the printed circuit board falls...
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There is no solder mask in the edge area of PCB
It is better to leave the solder pad on the same size as the copper pad. Then, we will set up the solder mask to meet the technical requirements of the correct production and assembly of the circuit board.
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What subjects do you need to learn when designing PCB? What ...
Printed circuit board (PCB), which is also known as printed circuit board (PCB) in Chinese, is an important electronic component, the support of electronic components and the carrier of electrical connection of electronic components. Because it is made by electronic printing, it is called "printed" circuit board.
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How to choose high frequency circuit board?
High frequency circuit board is mainly used for the accessories used in precision instruments. In the process of production and manufacturing, it has high requirements on its physical properties, precision and technical parameters. It can not only achieve high-speed signal with high requirements, but also improve the operation speed of relevant transmission devices. At the same time, different materials for circuit board are also required It will...
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SDEC, a leading enterprise of flexible circuit board, will i...
[guide]: China's leading flexible circuit board company, Shangda electronics, has disclosed that it will start a new round of fixed increase, with a financing amount of no more than 100 million yuan. The raised funds will be used to expand production capacity and invest in new technology research and development. At present, Shangda electronics has withdrawn from the new third board and is ready to launch an impact on the main board.
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Why are most PCB boards green?
Green color is solder mask ink, which is mainly composed of resin, talc powder and pigment. At present, the most famous ones in the market are Taiyo from Japan, Nanya resin from Taiwan, Changxing chemical industry from Taiwan and yongshengtai ink from Taiwan. The price is generally 60 ~ 120 yuan / kg. Of course, there are other colors, such as red, yellow, black, etc., green is the most widely used.
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What should be paid attention to when choosing PCB board man...
With the rapid development of the integrated circuit industry, the demand for PCB circuit board is only increasing, and the market demand is large. PCB is the so-called printed circuit board, which is the support of electronic components and the indispensable carrier of electronic printing. At the same time, there are many PCB circuit board manufacturers. So how should we choose PCB circuit board manufacturers?
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Guangdong University of technology PCB manufacturing process...
Entrusted by Guangdong University of technology, Guangzhou Yili bidding Agency Co., Ltd. carries out public bidding for the procurement of PCB manufacturing process integration system and other equipment. Suppliers who meet the requirements are welcome to bid.
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Design scheme of USB circuit protection
PPTC (positive temperature coefficient) device is a reliable and economical solution to provide current overload protection for computers and related devices. Since the device has various sizes and power ranges, circuit designers can choose the most appropriate style to meet the requirements of circuit design and USB specification.
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