source:Industry News release time:2022-07-19 Article author:yu Popular:pcb
The so-called copper pouring is to use the idle space on the circuit board as the reference plane, and then fill it with solid copper. These copper areas are also called copper pouring.
The meaning of copper cladding on the circuit board is to reduce the ground wire impedance and improve the anti-interference ability; reduce the voltage drop and improve the power supply; connect to the ground wire and reduce the loop area. Also for the purpose of keeping the PCB from being deformed as much as possible during soldering, most PCB manufacturers also require PCB designers to fill the open area of the PCB with copper or grid-like ground wires. If the copper cladding of the circuit board is not handled properly, it will not be worth the loss. Is the copper cladding "pros outweigh the cons" or "the harm outweighs the pros"?
We all know that in the case of high frequency, the distributed capacitance of the wiring on the printed circuit board will have an effect. When the length is greater than 1/20 of the corresponding wavelength of the noise frequency, the antenna effect will occur, and the noise will be emitted through the wiring. If there is a poorly grounded copper cladding in the PCB, the copper cladding will become something that transmits noise. Therefore, in a high-frequency circuit, do not think that if a certain part of the ground wire is grounded, this is the "ground". "Line" must be made with a spacing of less than λ/20, through holes in the wiring, and "good grounding" with the ground plane of the multi-layer circuit board. If the copper cladding is handled properly, the copper cladding not only has the effect of increasing the current, but also has the dual effect of shielding interference.
There are generally two basic ways of copper cladding on circuit boards, that is, large-area copper cladding and grid copper cladding. People often ask whether large-area copper cladding is good or grid copper cladding is good, and it is not good.
why? Large-area copper cladding has the dual effects of increasing current and shielding, but large-area copper cladding may cause the circuit board to warp or even bubble if it is over-wave soldered. Therefore, for large-area copper cladding, several slots are generally opened to alleviate copper foil blistering. The simple grid copper cladding is still mainly for the shielding effect, and the effect of increasing the current is reduced. From the point of view of heat dissipation, the grid has The benefit (it reduces the heating surface of the copper) also has a certain electromagnetic shielding effect.
However, it should be pointed out that the grid is composed of traces in staggered directions. We know that for circuits, the width of the traces has its corresponding "electrical length" (the actual size divided by the operating frequency of the circuit board). It can be obtained by the digital frequency corresponding to the operating frequency, see related books for details). When the operating frequency is not very high, the effect of grid lines may not be very obvious. Once the electrical length matches the operating frequency, it will be very bad. You It will be found that the circuit is not working properly at all, and signals that disturb the operation of the system are being emitted everywhere. Therefore, for colleagues who use grids, it is recommended to choose according to the design of the circuit board operation, and do not cling to one thing. Therefore, high-frequency circuits are used for multi-purpose grids with high anti-interference requirements, and circuits with large currents in low-frequency circuits are commonly used in good copper.
Read recommendations:
Six-layer Immersion Gold Board (BGA)
Analysis of related questions about the color of pcb circuit boards,Amplifier PCB Processing
Popular recommended products
Six-layer Immersion Gold Board (BGA)
2021-04-27Mobile phone template (six layers)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-05-24High frequency PCB
2021-04-27High frequency PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Computer card board (four layers)
2021-04-25Aluminum substrate (double-sided)
2021-04-27Single copper base PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-24Single-sided double-layer AL base PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Display board (six layers)
2021-04-27High frequency PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Silver oil perforated plate (double-sided)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Network communication board (sixth floor)
2021-04-29High frequency PCB
2021-04-27Laminate copper-based PCB after 4L (sample)
2021-04-27SMT stickers
2021-05-27Mobile phone board
2021-05-27DIP plugin
2021-05-27Mobile phone board
2021-04-27SMT stickers
2021-05-27DIP plugin
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26Related Information
The relationship between PCB safety distance and voltage
2024-04-22SMT surface mount processing.Hybrid circuit board PCB
2024-04-15PCB enterprises should pay attention to SMT matters.Electronic components PCB
2024-04-03PCB - the core building block of electronic products.Automotive Electronics PCB
2024-03-25PCB - the bridge and link of the electronic world
2024-03-18How to define high-frequency and high-precision circuit boards.Industrial Electronics PCB
2024-03-11USB PCB interface layout and wiring requirements
2024-01-22Electrolytic capacitor PCB.Steps for using PCB pins
2024-01-15Automotive ElectronicWhat aspects should be considered when processing and manufacturing PCB boards?
2024-01-08Electrolytic capaciWhat is the difference between a gold-plated circuit board and a gold-plated one?
2023-12-25When grinding PCB boards, attention should be paid to.Oscillator (belonging to crystal) PCB
2023-12-18Industrial Electronics PCB!What precautions should be taken when copying and grinding PCB boards
2023-12-11Do you know who is more suitable for LED direct display, regarding the difference between PCB board
2023-12-05Aluminum electrolytic capacitor PCB.What are the standards for selecting PCB boards
2023-11-27Surface Mount Technology (SMT) Phase PCB
2023-11-20Oscillator (belonging to crystal) PCB.The main functions of PCB board
2023-11-13What is the difference between RO filter and PCB filter
2023-11-06Method for determining blind hole PCB board
2023-11-01Electronic Manufacturing Services PCB!What are the effects of PCB board color on performance?
2023-10-23Introduction to the Manufacturing Steps and Requirements of PCBA Test Stand
2023-10-16PCB version maturity stage.AOI circuit board price
2023-09-25How to maintain a PCB circuit board
2023-09-19Development Trend of Printed Circuit Board.Zener diode PCB Vendor
2023-09-14Common problems and cause analysis of PCB circuit board sampling.Zener diode PCB price
2023-09-08What are the issues that need to be understood in PCB circuit board design?IGBT module PCB factory
2023-09-08How to reduce the risk of bending and deformation in PCB circuit board production?Inverter PCB Produ
2023-08-16What are the three main factors that constitute welding defects in PCB circuit boards?Multilayer PCB
2023-08-16The structure of a glass teapot.LCD Module PCB factory
2023-08-11Glass teapot.Inverter PCB Processing
2023-08-11PCB online debugging
2023-08-08