Shenzhen xinmaolong precision circuit Co,.LtdRelease Time：2022-01-15
PCB circuit boards have been developed as a technology substrate for decades. The long-term development of technology has brought about the compression of technology, resulting in a variety of layers of circuit boards. After getting a circuit board, many people are concerned about the quality of PCB circuit boards. The number of layers can not be distinguished
PCB circuit boards have been developed as a technology substrate for decades. The development of technology in the long period of time has brought technology compression. In order to meet the needs of science and technology, a variety of layers of circuit boards have been produced. Get a circuit board, the How to identify the number of layers?
Today, the PCB circuit board manufacturer will take you to understand the problem of identifying the number of layers of the circuit board.
The first is the common single-sided board, that is, only one side of the PCB board has lines (may have holes or no holes), and the other side is covered with substrate or direct insulating ink, without any lines, and the whole board is light-transmitting under strong light. (Excluding the special requirements of individual plates and processes), only one side of the cross section contains copper foil.
The double-sided board is similar. Generally, there are lines on both sides. There are copper holes as the "bridge" on both sides of the link board, and the entire PCB board is light-transmitting under strong light (except for individual boards and special process requirements), and the cross-section only has the PCB board. The outermost two sides contain copper foil;
The multi-layer board is special. In analogy, it is to superimpose the double-sided board like a sandwich, and there is a sandwich PCB in the middle. , 8 to 20 layers; satellites, navigation, rockets, etc. can reach more than 60 layers, and its precision can be imagined. In fact, CPU can also be understood as an ultra-precise "PCB" in microelectronics) The interlayer in the middle is generally called It's called the "inner layer".
The multi-layer PCB is opaque to the whole board or partially transparent and inconspicuous under strong light. The outermost ends and the middle position of the cross section contain copper foil. In the case of single-sided, double-sided, and multi-layer PCBs using the same plate and the same volume, the weight of the multi-layer PCB > the weight of the double-sided PCB > the weight of the single-sided PCB.