The signal with PCB change (such as step signal) propagates from a to B along the transmission line, and the coupling signal will be generated on the transmission line C-D. once the changed signal ends, that is, the signal returns to stable DC level, the coupling signal will not exist. Therefore, crosstalk only occurs in…
In PCB manufacturing, it is necessary to punch and cut according to certain specifications. If each operation needs mold or protection board, it is too troublesome and inefficient. It is easier to use laser cutting. Laser cutting mainly includes carbon dioxide laser (CO2 laser) and ultraviolet laser (UV laser). Let’s take a look at their working…
Even if the trend of PCB manufacturing and usage is small, it will also affect consumers. Although there may be more time, the following four main technology trends are expected to maintain the leading position in the PCB market for a long time and lead the whole PCB industry to different development directions. 1. High…
There is no doubt that printed circuit board (PCB) is a milestone tool in human technology. Why? This is because it is hidden in every electronic device today. Like other great inventions in history, PCB is also gradually mature with the progress of the historical wheel. Up to now, it has a history of 130…
At present, with the requirement of PCB size becoming smaller and smaller and the requirement of device density becoming higher and higher, the difficulty of PCB design is gradually increasing. How to shorten design time while ensuring quality? This requires engineers to have excellent technical knowledge and master some design skills. Determine the number of…
How often do you start the PCB development process and are bothered by time-consuming management tasks? Once ready for production, a design review and correction of DFM issues will be required, which will take your own time. With the acceleration of product development progress and the shortening of product life cycle, the pressure of increasing…
Do you know “why PCB must be baked before SMT passes the reflow oven after the expiration date of PCB”? The main purpose of PCB baking is to remove moisture and moisture, and to remove moisture contained in PCB or absorbed from outside, because some PCB materials can easily absorb water molecules. In addition, PCB…
Recently, the upstream materials of PCB have been rising one after another, except that the international copper price has been breaking through 7000 US dollars and approaching 8, In addition to the $000 mark, the supply and demand of electronic grade glass fiber cloth and glass fiber yarn are also reversed. After the third quarter…
Recently, we encountered a PCB leakage problem. The cause is a low-power product. The current of UA level of the whole machine was aged at room temperature for a period of time. After using it for a period of time, it was found that the power consumption of individual sample machines even reached Ma level.…
In the design of PCB, the ESD resistance design of PCB can be realized by layering, proper layout and installation. In the design process, most of the design modifications can be limited to the increase or decrease of components by prediction. By adjusting PCB layout and wiring, ESD can be well prevented. Static electricity from…
In PCB assembly and processing, PCB will be inspected and tested before processing to select PCB meeting SMT production requirements, and unqualified PCB will be returned to PCB manufacturer. Specific requirements of PCB can refer to IPC-A-610C international general assembly standard of electronic industry. The following are some basic requirements of small-scale SMT assembly processing…
PCB: “you want to change the scheme? Brother, I just laid out the device.” Overall: “the original solution really needs to be changed. Considering the heat dissipation, the package needs to be changed. Your current layout needs to be modified! “ PCB: “this board can’t fit into the layout at all!” Overall: “I let it…
SMT Stencils (solder paste and adhesive stencils) are an absolute necessity for SMT PCB assembly. SMT stencils from PCBSky are manufactured using laser technology, which ensures a constant process quality through its high level of precision. Our SMT Stencils fulfil the most stringent quality requirements with optimal register accuracy and cutting precision. The precise axial…
After PCB design, the most important step before PCB production is to export Gerber file.There are three versions of the existing Gerber file: Gerber x2: the latest Gerber format, which can insert layer information and attributes of boards; Extended Gerber (rs-274x) is widely used; The standard Gerber, or rs-274d, is an old version, which is…
Recently, the high momentum of the electronic industry has been transmitted to the PCB field. With the coming of the end of the year, the global inventory peak season is coming, and the demand accumulated in the first half of the year will be released in the second half of the year. Moreover, overseas orders…
The IPC (Association Connecting Electronics Industries) is a widely recognized organization that develops and publishes standards related to the design, assembly, and manufacturing of electronic products, including PCBAs (Printed Circuit Board Assemblies). Here are some of the important IPC standard documents related to PCBA electronic products: IPC specification catalog – PCB assembly IPC/EIA J-STD-001C Requirements…
