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06-152020What is PP(Prepreg) and core in PCB manufacturingPrepreg is a thin insulating material of PCB. Prepreg is not prepreg before being laminated, also known as prepreg material, which is mainly used for the bonding material and insulating material of the inner conductive pattern of multilayer circuit board. After the Prepreg is laminated, the semi-cured epoxy resin is squeezed out, starts to flow and solidifies, bonding the multilayer circuit boards together and forming a reliable insulator. Core is the basic material for making printed circuit boards. Core is also called the core board, has a certain hardness and thickness, and double copper. Therefore, the multi-layer PCB is actually formed by pressing the Core and Prepreg.
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06-142020The PCB files required for manufacturingMost PCB design engineers are used to designing PCB files and sending them directly to PCB factories for processing. The most popular practice in the world is to convert PCB files into GERBER files and drilling data and then submit them to PCB manufacturers, why it's necessary to do in this way?
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06-142020The material used in PCB manufacturingPrinted circuit boards will appear in almost every electronic device. It is the carrier of all electronic devices. There are PCBA everywhere in the computer, from small household appliances in daily life to automotive electronic devices. PCB boards are indispensable. Applications. So what materials are needed in the manufacturing process of the circuit board? Let's understand together.
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06-132020What is high frequency PCBDefinition of high-frequency pcb board made by circuit board. High-frequency board refers to a special circuit board with high electromagnetic frequency, which is used in the field of high frequency (frequency greater than 300MHZ or wavelength less than 1 meter) and microwave (frequency greater than 3GHZ or wavelength less than 0.1 meter) PCB is a circuit board produced on microwave substrate copper-clad board using part of the process of ordinary rigid circuit board manufacturing method or using special processing methods. Generally speaking, high-frequency boards can be defined as circuit boards with frequencies above 1GHz.
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06-132020The design rules of copper pad in PCB manufacturingThe two ends of the chip components are not connected to the plug-in components. Test points should be added. The diameter of the test point is equal to or greater than 1.8mm to facilitate online tester testing. If the IC foot pads with dense foot pitch are not connected to the hand-insertion pads, the test pads need to be added. If it is a SMD IC, the test point cannot be placed in the SMD IC silk screen. The diameter of the test point is equal to or greater than 1.8mm to facilitate online tester testing.
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06-122020The simple classification of printed circuit boardsPCB can be divided into single panel, double panel and multilayer board according to the number of layers; according to the material, it can be divided into flexible PCB board (flexible board), rigid PCB board and rigid-flexible PCB board (rigid-flexible board). The printed circuit board is one of the important electronic components and the carrier of electronic components. The following article will briefly introduce these types of PCBs for you.
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06-122020What is PCB gold fingersThe gold finger PCB refers to a row of square pads arranged at equal intervals, with exposed copper gold plating. Mostly used for electrical connection pins for connection of boards, LCD connections, motherboards, chassis, etc., because a thin layer of gold is plated on its copper foil nickel plating layer.
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06-112020Introduction about the aluminum led PCBThe PCB boards used in LEDs are generally aluminum substrates. Why do LED chip processing choose aluminum substrates? What are the advantages and disadvantages of aluminum substrates? This article will introduce in details..
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06-112020Introduction about Immersion Tin PCBWith the widespread implementation of lead-free PCB soldering and the widespread application of immersion tin board in high reliability board parts, especially automotive boards, the proportion of surface treatment of immersion tin is rising, so a better understanding of the surface treatment of Imm Tin The characteristics are very important to ensure the reliability of the immersion tin PCB.
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06-102020What's the difference between Flex PCB and Rigid PCBFPC is a kind of printed circuit board, which is called flexible circuit board, and we call it FPC PCB board. FPC usually uses PI as the base material, which can stop bending and flexing at will. PCB is a so-called rigid circuit board, which is usually called a hard board. Generally, FR4 is used as the base material, and it cannot be bent or flexed. The FPC flexible circuit board is used in the link that requires repeated flexing and some small parts. The PCB rigid circuit board is often used in some centers that do not require bending and are relatively hard.
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06-102020Introduction about heavy copper PCB with high TGWhen the temperature of a high Tg heavy copper PCB rises to a certain area, the substrate will change from "glass state" to "rubber state". The temperature at this time is called the glass transition temperature (Tg) of the plate. That is, Tg is the maximum temperature (° C) at which the substrate remains rigid. In other words, ordinary PCB substrate materials not only produce softening, deformation, melting and other phenomena at high temperatures, but also manifest in mechanical, A sharp drop in electrical characteristics.
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06-092020The difference between coil PCB and module PCBThe so-called module board is a set of units that can achieve a certain function. If these modules are individually made into boards, they will become module boards. In comparison, the coil PCB is more portable, and has a small size and light weight, with an openable coil, easy access, and a wide frequency range. From the drawing, there is a clear difference between the coil PCB and there are many windings like fingerprints.
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06-092020Why Rogers 4350 PCB is usedThe choice of PCB laminate must strike a balance between meeting design requirements, mass production, and cost. In simple terms, the design requirements include electrical and structural reliability. This board problem is usually more important when designing very high-speed PCB boards (frequency greater than GHz). For example, the material of FR4 is now commonly used, and the dielectric loss Df (Dielectricloss) at a frequency of several GHz will be large, which may not be applicable.
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06-082020Introduction about via in pad PCBPCB using resin plug holes This process is often because of BGA parts, because traditional BGA may do VIA between PAD and PAD to the back to route, but if the BGA is too dense, VIA When you can't go out, you can directly drill holes from the PAD to go to another layer, and then fill the holes with resin to form copper plating to become PAD, also known as the VIP process (via in pad). If you only do vias on the PAD without using resin plug holes, it is easy to cause tin leakage and lead to short circuit on the back and empty welding on the front.
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06-082020The manufacturing technology for half hole PCBWith the rapid development of electronic products, high-density multi-function miniaturization has become the development direction. The components on the printed circuit board are increasing in geometric index, but the size of the circuit board is constantly decreasing, and it is often necessary to match some small carrier boards. If the round hole of the small carrier board is soldered to the mother circuit board with solder, due to the large volume of the round hole and the problem of virtual soldering, the child and mother printed circuit boards cannot be well connected electrically, so a metallization half hole PCB.