What is FR-4? FR-4 is a grade for flame-retardant fiberglass reinforced epoxy material. Therefore, FR-4 PCB offers higher level of heat resistance than standard PCB. The FR-4 board is divided into Three classification, determined by the number of copper trace layers: 1. Single layer PCB 2. Two layer PCB 3. Multilayer P...

Generally speaking, in PCB multi-layer board design, four-layer boards are used more. So, do you know the design rules of PCB four-layer board? JRPanel would like to introduce the design rules of the four-layer board for everyone today. 1. Design form of four-layer board: (1) Uniform spacing: The biggest advantage is t...

Why are multi-layer PCBs mostly even-numbered layers and few odd-numbered layers? There are single-layer, double-layer and multi-layer PCBs. The number of layer is not limited. There are currently more than 100 layers on boards. Common multi-layer PCBs are four-layer and six-layer boards. So everyone will have this que...

Because the radio frequency (RF) circuit is a distributed parameter circuit, skin effect and coupling effect are prone to occur in the actual work of the circuit, so in the actual PCB design, it will be found that the interference radiation in the circuit is difficult to control, Such as: mutual interference between di...

Right-angle routing is generally a situation that needs to be avoided as much as possible in PCB routing, and it has almost become one of the standards for measuring the quality of routing. So how much influence will the right-angle routing have on signal transmission? In principle, right-angle routing will change the ...

In the normal circuit board design process, we can find that the circuit is always crooked. We all know that the shortest straight line between two points. Then why is the circuit on the circuit board designed to be bent? Can't it be directly designed as a straight line? First of all, we have to understand a concep...

PCB circuit board inks are generally divided into three types, namely PCB circuit etching ink, solder mask ink and text ink. There are also conductive carbon inks and conductive silver pastes. The latter two are generally used in relatively small amounts. 1. PCB Photosensitive Etching Ink First, let's talk about th...

"High-speed circuit" has become a term often mentioned by electronic engineers today, but what is a high-speed circuit? This is indeed a fuzzy concept. In fact, the industry does not have a unified definition of high-speed circuits. Usually, there are many views on the definition of high-speed circuits: some ...

What kind of laser cutting machine is used for PCB, what size can be processed, what is the processing effect, how fast is the laser cutting PCB. These are the most problems when manufacturers and processors would think about when buying PCB laser cutting machines. In fact, the application of the processing technology ...

When we are doing PCB design, we need to design various areas according to different PCB structures and the needs of some electronic products, including allowable layout area design, prohibited layout area design, allowable wiring area design, and so on. In the allegro design, these are set in Areas. As shown below: In...

Laser marking is a very advanced marking technology. Through the focused laser engraving technology, the characters and patterns that need to be marked are carved on the surface of the object. Compared with traditional printing technology, laser marking has the characteristics of good quality, high consistency, strong ...

As a qualified and excellent PCB design engineer, it is not enough to learn how to pull wires. While learning various PCB design knowledge, you also need to enrich your knowledge reserve. This article will share with you 6 little common sense related to PCB. Come see what you know! Who invented PCB? The inventor of PCB...