What are SMT, DIP? SMT is the abbreviation of surface mount technology, which is the most popular technology and process in the electronic assembly industry. It is a kind of circuit assembly technology that the surface assembly components are installed on the surface of circuit board or other substrates, and are welded and assembled by…
The production of PCB is very complex. Taking four-layer PCB as an example, the manufacturing process mainly includes PCB layout, core board production, inner PCB layout transfer, core board drilling and inspection, lamination, drilling, copper chemical precipitation on hole wall, outer PCB layout transfer, outer PCB etching and other steps. 1. PCB layout The first…
As PCB design engineers, we all know that impedance should be continuous. However, PCB design always has impedance can not be continuous, at this time how to do? What is impedance To clarify a few concepts, we often see impedance, characteristic impedance, instantaneous impedance. Strictly speaking, they are different, but they are still the basic…
Designing the PCB (Printed Circuit Board) stack structure is a crucial step in PCB layout, as it directly affects the electrical performance, manufacturability, and reliability of the PCB. Here are the steps to design a PCB stack structure: Determine the Layer Count: Start by deciding how many layers your PCB will have. This decision is…
There are single-sided, double-sided and multi-layer PCB boards. The number of layers of multi-layer PCB is unlimited. At present, there are more than 100 layers of PCB, while the common multi-layer PCB is four-layer and six-layer PCB. Then why do you have “Why are multilayer PCB boards even?” What about this question? Relatively speaking, even…
USB, which stands for Universal Serial Bus, is a universal interface standard used to connect various external devices to computers. USB interfaces are often integrated into PCBs (Printed Circuit Boards) to enable data transfer and power supply between devices and computers. Here is an introduction to implementing a USB interface on a PCB: USB Types:…
The calculation of PCB current carrying capacity has been lack of authoritative technical methods and formulas. Experienced PCB layout engineers can make a more accurate judgment based on personal experience. But for layout novices, it’s not a problem. The current carrying capacity of PCB depends on the following factors: line width, wire thickness (copper foil…
Designing PCBs (Printed Circuit Boards) with Ball Grid Array (BGA) electronic components presents unique challenges and considerations due to the compact and densely packed nature of BGAs. Here’s an overview of the key points to keep in mind when designing PCBs with BGAs: Component Selection: Choose BGAs based on the specific requirements of your project.…
The first order is relatively simple, and the process and process are easy to control. Second order began to trouble, one is the problem of alignment, a hole and copper plating problem. There are many kinds of second-order designs. One is that the positions of each step are staggered. When the next adjacent layer needs…
Common format of Gerber file used in PCB manufacturing: Rs-274-x (common) Rs-274-d (common) RS-274 Fire 9000 Mda 9000 Barco DPF The standard Gerber file format can be divided into rs-274 and rs-274x Gerber file and aperture in rs-274 format are separate and different files. The aperture of rs-274x format is integrated into Gerber file, so…
ENIG PCB and flash gold PCB are commonly used in PCB design and PCB production. With the increasing integration of IC, IC pins are more and more dense. However, it is difficult for HASL process to blow even the fine pad, which brings difficulty to SMT assembly; in addition, HASL PCB has a short service…
1. The PCB layout design should fully comply with the design principle of placing along the signal flow direction in a straight line and avoid looping as far as possible. 2. Each filter capacitor should be placed as close as possible to the power supply pin of the chip 3. Whether the printed circuit board…
The so-called "no rules, no square circle", PCB design is the same. When engineers carry out PCB layout, some "rules" must be followed by everyone. 1. Understand the manufacturer's manufacturing specifications – trace width, trace spacing, via hole requirements and layer requirements. 2. Limit values of vias, trace width and safe spacing should…
PCI Express (peripheral component interconnect express) is a high-speed serial computer extension bus standard. Its original name is “3gio”. It was proposed by Intel in 2001 to replace the old PCI, PCI-X and AGP bus standards. PCIe is a high-speed serial point-to-point dual channel high bandwidth transmission. The connected device allocates exclusive channel bandwidth and…
1. Why do EMC design for products? Answer: meet the functional requirements of the product, reduce the debugging time, make the product meet the requirements of EMC standards, so that the product will not produce electromagnetic interference to other equipment in the system. 2. How many aspects can EMC design be carried out? Answer: Circuit…
All kinds of electronic devices are assembled on the circuit board by surface packaging process. Which is to assemble the assembled PCB with the shell to form a finished product. That is to say, PCB blank board passes through SMT and then goes through the whole process of dip plug-in, referred to as PCB’A. PCBA…
