PCB News - PCBA and PCB industry news. page 124

2021-08-06

PCB manufacturers are more optimistic about the PCB market. With the increase in capital expenditures and the demand for process optimization and automation.

2021-06-28

When hardware engineers are new to multilayer PCBs, it is easy to get dizzy. There are ten and eight layers at every turn, and the lines are like spider webs.

2021-06-22

Since the second half of last year, the crisis of automotive chip shortage has begun to start from the beginning of this year.

2021-06-17

When talking about printed circuit board, novices often confuse "PCB schematics" and "PCB design files", but in fact they refer to different things.

2021-06-05

Hybrid integrated circuit is an integrated circuit formed by a combination of semiconductor integrated technology and thickness (thin).

2021-06-02

The important influence of PCB layout on printed circuit boards determines the cost of manufacturing

2021-06-01

The size of the printed circuit board starts from the determined size. Because the size of the printed circuit board...

2021-01-22

In this paper, the supply chain pattern of special electrolytic copper foil, special resin and special fiberglass cloth used in new and high-end substrate materials in recent years, as well as the new performance requirements of these three materials are reviewed.

2021-05-26

5G construction of base stations takes the lead. After the official 5G license is issued, the market space for base station deployment is accelerated, driving upstream high-end PCBs such as high-frequency, high-speed, and multi-layer PCBs..

2020-11-12

It is necessary to thoroughly understand the principles of some typical circuits and be familiar with them. The drawings are dead, and the thoughts in the head are alive. They can be analogized, reasoned, and inferred. For example, the switching power supply is always inseparable from the oscillating circuit, switching tube, and switching transformer. During the inspection, check whether the circuit is vibrated, whether the capacitor is damaged, whether the transistors and diodes are damaged, and no matter what switching power supply is touched, it can be operated. They are almost the same, do not have to force a circuit diagram; for example, a single-chip microcomputer system, including crystal oscillator, three buses (address line, data line, control line), input and output interface chips, etc., are also inseparable from these ranges for maintenance; another example is various operational amplifiers The composed analog circuit, despite its numerous changes, is inferred on the basis of "virtual shortness" and "virtual disconnection", and it can also have a clue, analyze each one, and make it clear. After practicing good analysis and reasoning skills, even if you encounter a device you have never seen before, you only need to understand the principle.

2021-05-22

For high-frequency circuit design, there are already good CAD softwares. Its powerful functions are enough to overcome people’s shortcomings in design experience and tedious parameter retrieval and calculation. Coupled with powerful network analyzers, it should be Those with a little experience can complete the RF components with better quality. However, this is not the case in practice.

2021-05-15

In some DDR3 series of articles, although there are a small part of the case that talks about the problem, it is only written to introduce the topic, and it is only to stop. Since it is a case, the ins and outs of the problem must be described clearly. The problem in this case is Such:

2021-04-21

PCB circuit board understands that the relevant application software is established on the PCB board machine, and the idea of virtual instrument is adopted, that is, various functions of traditional instruments are realized through software, including oscilloscope, signal generator, and various mathematical processing of collected data. During the test, a digital signal is sent out through the test software.

2021-01-29

Whether it is gold-plated PCB or silver-plated PCB, the purpose of the process itself is to prevent oxidation and protect the pads, so that they can ensure good yield in the following welding process.

2021-01-29

PCB industry integrates electronics, machinery, computer, optics, materials, chemical industry and other disciplines to engage in product manufacturing services, which requires a comprehensive understanding and comprehensive understanding of the corresponding disciplines, and the ability to comprehensively apply them to actual production.

2021-01-23

What is the significance of impedance to PCB circuit board, PCB circuit board why to do impedance?

2020-11-13

The structure of the circuit board The circuit board is mainly composed of pads, vias, mounting holes, wires, components, connectors, filling, electrical boundaries, etc. The main functions of each component are as follows:

2020-11-12

Any electronic product, from a rectifier composed of several parts to a computer system composed of thousands of parts...

2020-11-11

To manufacture a PCB, the layout design of the PCB must first be carried out, which is usually done through CAD (Computer Aided Design). CAD is used to draw schematics and design the layout of the PCB. Possible errors can be detected in advance before the PCB is manufactured. After testing and checking that the traces and positions of all components on the PCB are correct, the PCB can be manufactured according to the layout.

2020-11-11

With the needs of printed circuit board design, the direct plating process has been continuously developed in the past few years. Driven by miniaturization, from leaded components to surface mount components, PCB design has evolved to adapt to miniature components with more pins, which leads to increased PCB layers, thicker circuit boards, and through holes The diameter is smaller. In order to meet the challenge of high aspect ratio, the technical specifications of the production line should involve the improvement of the solution transfer and exchange of the micropores, such as the use of ultrasonic to quickly wet the holes and remove bubbles, and improve the ability of air knives and dryers to effectively dry thick circuits Small holes on the board.