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Have you noticed that now more and more of our lighting is using led lighting.What is LED? Compared to the traditional light bulbs, LEDs have lower power consumption, longer lifetime and higher energy efficiency. In the PCB industry,when we say LED PCB, it refers to the pcb used for LED lighting, if you are looking for a suitable LED PCB for your lighting system, this article may bring you something. WHAT ARE LEDS COMPOSED OF?LED is an initial light-emitting diode that produces light when an electric current passes through. LEDs typically have negative and positive electrodes, which generate light in the visible light region.The LEDS are glued to the PCB by soldering process and have electrical connections for lighting.Since light-emitting diodes dissipate a lot of heat when they are in use, when you are designing LED, the metal core is usually the best choice for LED PCB, it is because that it dissipates heat more faster. Among them, the metal material aluminum is the most widely used
In recent years, with the continuous development of electronic products and the further advancement of intelligence, the design of printed circuit boards (PCBs) has become increasingly important. The design of PCB multilayer structure occupies a core position in modern electronic equipment, and its rationality directly affects the performance and reliability of electronic products. Firstly, let's take a look at the design principles of a multi layer PCB structure. Firstly, the selection of layers is very important. The more layers there are, the higher the complexity of signal transmission, so a balance between circuit complexity, electromagnetic interference, and cost needs to be considered in the design. Secondly, in the design of PCB multilayer boards, the signal circuits of each layer should be reasonably arranged. There should be sufficient spacing between different signal lines to avoid mutual interference. In order to improve the speed of signal transmission and reduce e
With the continuous development of technology, LED circuit boards are playing an increasingly important role in the lighting industry. They not only provide high brightness lighting effects, but also have advantages such as energy conservation, environmental protection, and long service life. In order to further promote the development of LED light circuit boards, new design trends are constantly emerging. Today, the editor will delve into the current 5 cutting-edge LED light board PCB design trends and look forward to the possibilities that technology can bring to the future. Firstly, customized design has become mainstream. Traditionally, the design of LED light circuit boards has been relatively uniform, but now the market demand is constantly personalized, and people's requirements for lighting are becoming increasingly diverse. Therefore, more and more lamp panel manufacturers are providing customized design services to meet the needs of different customers. Customized des
1、 The Function and Significance of High Frequency Board in Drone PCB A high-frequency board is a printed circuit board specifically designed for processing high-frequency signals. In unmanned aerial vehicles, the processing of high-frequency signals is very important. Drones typically use high-frequency devices such as radar, communication equipment, and radio equipment to achieve their functions. And these high-frequency devices require high-frequency boards to ensure the stability and reliability of signal transmission. High frequency boards can effectively reduce signal transmission loss and improve transmission efficiency. Therefore, using high-frequency boards can improve the performance of drones and increase their stability and reliability. 2、 Application of High Frequency Board in Drone PCB 1. Signal transmission The signals generated by high-frequency devices in drones must be transmitted to the corresponding positions through the transmission line of the drone PCB. T
PCB circuit board reflow soldering is one of the common welding methods in the electronic assembly process. It firmly fixes electronic components on the PCB board by applying appropriate heat and melted solder paste to pre arranged welding points. However, some common problems may also arise during the reflow soldering manufacturing process. The manufacturer of intelligent circuit boards will introduce these issues and corresponding solutions.1、 Tin splashing on the board surfaceProblem description: Tin splashing on the board refers to the excessive amount of solder around the welding point during reflow soldering. This may cause damage to components near the welding point, and even cause short circuits or welding failures.Solution: There are several methods to solve the problem of tin splashing on the board surface. Firstly, check whether the size and position of the welding points are appropriate to avoid excessive soldering caused by design defects. Secondly, adjust the
In the manufacturing of electronic products, PCB (Printed Circuit Board) is a very important component. The number of layers on a PCB board determines the complexity and functionality of the circuit. Therefore, understanding and accurately determining the number of layers of PCB boards is crucial for the design and manufacturing of electronic products. So, how to accurately determine the number of layers of a PCB board? The editor of the manufacturer of intelligent circuit boards will take you to understand. Generally speaking, the following methods can be used to make judgments: 1. Appearance observation method: The number of layers of a PCB board can be preliminarily determined by observing its appearance with naked eyes. Under naked eye observation, multi-layer PCB boards appear thicker, while single-layer or double-layer PCB boards appear thinner. However, due to the trend of miniaturization in modern electronic products, many PCB boards are very thin, making it difficult to
1. Material selection specifications: Medical PCB boards must be made of materials that comply with medical industry standards. These materials need to undergo strict safety and reliability testing to avoid any negative impact on patient health. 2. Electrical performance specifications: Medical PCB boards need to have good electrical performance, including stable voltage output, low noise, and low power consumption. These performance requirements are achieved through appropriate design and high-quality components to ensure the normal operation and accuracy of medical equipment. 3. Environmental adaptability specifications: Medical equipment may be affected by various environmental conditions during use, including temperature, humidity, and vibration. Therefore, medical PCB boards need to have good environmental adaptability to ensure reliability and stability under various extreme conditions. 4. Production process specifications: The production of medical PCB boards needs to
1. Appearance inspection: Check whether the tin material is intact, whether there are obvious crystalline, powdery, fibrous and other foreign objects, and whether there are drag marks, spots and other phenomena. 2. Wet tensile test: Check the tensile strength, elongation at break, and modulus at break of the tin material. 3. Wet bending test: Check the bending strength and fracture modulus of the tin material. 4. Hot tempering test: Check the heat resistance of the tin material. 5. Resistivity test: Check the resistivity of the tin material. 6. Corrosion resistance inspection: Detect the corrosion resistance of the tin material, check whether there is agglomeration and corrosion phenomenon in the tin material. 7. Surface corrosion resistance test: Check the surface corrosion resistance of the tin material and check for any corrosion marks on the surface.
The influence of welding process parameters on the surface quality of welding is quite complex, mainly including the following key points: 1. Control of preheating temperature The function of preheating: ① Fully volatilize the solvent in the soldering flux to avoid affecting the wetting of the printed board and the formation of solder joints when the printed board passes through soldering; ② Bring the printed circuit board to a certain temperature before welding to prevent warping and deformation caused by thermal shock. Based on our experience, the preheating temperature is generally controlled at 180 200 ℃ and the preheating time is 1-3 minutes. 2. Welding rail inclination angle The inclination angle of the track has a significant impact on the welding effect, especially when welding high-density SMT devices. When the inclination angle is too small, bridging is more likely to occur, especially in welding, where the "shielding area" of SMT devices is more prone to bridging; If
In wave soldering, the main process materials used are flux and solder. 1. The application of flux can remove oxides from the welding surface, prevent reoxidation of the solder and welding surface during welding, reduce the surface tension of the solder, and help transfer heat to the welding area. Flux plays a crucial role in controlling welding quality. At present, the most commonly used flux for wave soldering is non cleaning flux, and there are the following requirements when selecting flux: (1) The melting point is lower than that of solder; (2) The infiltration diffusion speed is faster than that of melted solder; (3) The viscosity and specific gravity are smaller than those of solder; (4) Stable storage at room temperature. 2. Quality control of solder Tin lead solder continuously oxidizes at high temperatures (250 ℃), causing a continuous decrease in the tin content of the tin lead solder in the tin pot, deviating from the eutectic point, resulting in poor flowability
1. Pad design (1) When designing plug-in component pads, the pad size should be designed appropriately. If the solder pad is too large, the solder spreading area is large, and the formed solder joints are not full, while the surface tension of the smaller solder pad copper foil is too small, and the formed solder joints are non wetting solder joints. The fit gap between the aperture and the component lead is too large, which is prone to false soldering. When the aperture is 0.05-0.2mm wider than the lead and the diameter of the solder pad is 2-2.5 times the aperture, it is an ideal welding condition. (2) When designing solder pads for SMD components, the following points should be considered: in order to eliminate the "shadow effect" as much as possible, the solder end or pin of SMD should be facing the direction of the tin flow to facilitate contact with the tin flow and reduce false soldering and solder leakage. For smaller components, they should not be placed behind larger co
In recent years, with the continuous development of electronic products and the further advancement of intelligence, the design of printed circuit boards (PCBs) has become increasingly important. The design of PCB multilayer structure occupies a core position in modern electronic equipment, and its rationality directly affects the performance and reliability of electronic products. Firstly, let's take a look at the design principles of a multi layer PCB structure. Firstly, the selection of layers is very important. The more layers there are, the higher the complexity of signal transmission, so a balance between circuit complexity, electromagnetic interference, and cost needs to be considered in the design. Secondly, in the design of PCB multilayer boards, the signal circuits of each layer should be reasonably arranged. There should be sufficient spacing between different signal lines to avoid mutual interference. In order to improve the speed of signal transmission and reduce ele
With the continuous development of technology, LED circuit boards are playing an increasingly important role in the lighting industry. They not only provide high brightness lighting effects, but also have advantages such as energy conservation, environmental protection, and long service life. In order to further promote the development of LED light circuit boards, new design trends are constantly emerging. Today, the editor will delve into the current 5 cutting-edge LED light board PCB design trends and look forward to the possibilities that technology can bring to the future. Firstly, customized design has become mainstream. Traditionally, the design of LED light circuit boards has been relatively uniform, but now the market demand is constantly personalized, and people's requirements for lighting are becoming increasingly diverse. Therefore, more and more lamp panel manufacturers are providing customized design services to meet the needs of different customers. Customized desig
Firstly, the first step in the production of new energy vehicle PCB boards is the design of circuit board drawings. The designer draws the layout and circuit connection drawings of the circuit board based on the functional and dimensional requirements of the electronic equipment of the new energy vehicle. The accuracy and rationality of design drawings are crucial for the subsequent manufacturing process. Next is the plate making and electroplating of the circuit board. Plate making is the process of transferring design drawings to photoresist through lithography technology, and then gradually exposing the copper layer through chemical corrosion to form the required circuit lines. Next, the copper plate is immersed in an electroplating bath, and through the action of current, a layer of copper foil is formed on the circuit line to enhance conductivity and durability. The third key step is drilling and deburring. In this step, the high-speed drilling on the small lathe drills n
1. Design and Planning: Based on the functions and requirements of the sensor, the manufacturer designs and plans to determine the required type and size of the circuit board. 2. Material selection: According to design requirements, select suitable circuit board materials, usually using FR-4 glass fiber composite material. 3. Printed Circuit Board (PCB) Manufacturing: Using printing technology to create circuit patterns on a substrate. This process involves processing the copper foil layer into the desired circuit shape, covering the surface of the circuit board with photosensitive adhesive, and using ultraviolet radiation to define the circuit pattern. 4. Chemical etching: By chemical etching, unnecessary copper foil layers are peeled off, leaving only the required wiring. This ensures that the circuit will not short-circuit. 5. Punching: Drill holes in the locations where components need to be installed to facilitate the installation of electronic components. 6. Assembly of
Industrial circuit board damage usually refers to a component being damaged, possibly a chip, a capacitor, or even a small resistor. The repair process involves identifying and replacing the damaged component. 1. Resistors with small resistance values and capacitors with large capacity are prone to damage A resistor with a small resistance value is often used in power supply lines to limit current, which acts as a fuse. If the current is too high, it will first burn out. In addition, many ground capacitors are used in power supply lines for filtering, and their size and capacity are generally large. If the voltage or current is unstable, the capacitors will break down and cause leakage. 2. Fault characteristics and maintenance of capacitor damage The failure caused by capacitor damage is the highest in electronic devices, with electrolytic capacitor damage being the most common. Capacitor damage is manifested as: 1. reduced capacity; 2. Complete loss of capacity; 3. Leakage; 4
(1) There should be a reasonable direction: such as input/output, AC/DC, strong/weak signals, high-frequency/low-frequency, high-voltage/low-voltage, etc. Their direction should be linear (or separated) and should not blend with each other. Its purpose is to prevent mutual interference. (2) Choose a good grounding point: For example, the multiple ground wires of the forward amplifier should be merged before connecting to the main ground, etc. (3) Reasonably arrange the power filter/decoupling capacitors: Generally, only a few power filter/decoupling capacitors are drawn in the schematic diagram, but they are not indicated where they should be connected. In fact, these capacitors are designed for switching devices or other components that require filtering/decoupling, and they should be arranged as close to these components as possible. (4) There is a particular emphasis on lines: if conditions permit, lines that are wide will never be thin; High voltage and high-frequency lines
The through hole plays a role in connecting and conducting circuits, and the development of the electronics industry has promoted the development of PCBs, resulting in the emergence of plug hole technology. In order to meet the customer's requirements, the process of conducting and plugging holes can be described as diverse, with a particularly long process flow and difficult process control. So, how is the process of plugging through holes in PCB circuit boards achieved? Let's take a look together with the editor: 1、 Plug hole process after hot air leveling This process flow is: board surface resistance welding → HAL → plug hole → curing. Production is carried out using a non plug hole process, and after hot air leveling, aluminum mesh plates or ink blocking nets are used to complete the plug holes of all fortresses. Plug ink can be used as photosensitive ink or thermosetting ink. This process flow can ensure that the guide hole does not fall off oil after hot air leveling, but
What are the design requirements for PCB printed circuit boards in PCB sampling? Let's take a look together: 1. Accurate This is the most basic and important requirement for printed circuit board design. Accurately implement the connection relationship of the electrical schematic diagram to avoid errors such as "short circuit" and "open circuit". Generally, products need to undergo more than two rounds of trial production and modification, while CAD software with strong functions has inspection functions to ensure the correctness of electrical connections. 2. Reliable A correctly connected circuit board may not necessarily have good reliability, such as improper selection of boards, incorrect board thickness and installation fixation, improper component layout and wiring, etc., which may cause the PCB to not work reliably. 3. Reasonable A printed circuit board component is closely related to the rationality of the printed circuit board, from manufacturing, inspection, assembl
A rigid circuit board is a type of circuit board with a fixed shape and size, usually made of glass fiber cloth based (FR-4) material. Due to its high strength and good electrical performance, rigid circuit boards are widely used in scenarios that require high stability and reliability, such as motherboards for electronic products such as computers, mobile phones, televisions, etc. Rigid circuit boards have good mechanical strength and can fix various electronic components, ensuring the stability and reliability of the circuit. The advantages of rigid circuit boards are high stability and low cost, which are suitable for most general electronic devices. Its rigid structure can provide good resistance to vibration and impact, which helps improve the stability and reliability of electronic products in use. In addition, the manufacturing process of rigid circuit boards is mature, with relatively low costs, suitable for large-scale production, and is also a mainstream choice in the fiel
The development of future automotive circuit boards can foresee two major trends: intelligence and environmental protection. Intelligence is because, with the development of technology, cars are increasingly relying on electronic technology, especially the application of AI artificial intelligence technology, which greatly improves the intelligence of car circuit boards and endows cars with more possibilities. Environmental protection is due to the production of harmful substances such as copper, nickel, lead, and other heavy metals during the manufacturing process of circuit boards, which pollute the environment after being discarded. Therefore, environmentally friendly design and manufacturing, as well as the recycling of circuit boards, will be an important trend for future development. The importance of automotive circuit boards as the brain of automobiles is self-evident. Whether it is the daily operation of cars or bringing humanized intelligent driving to cars, it is insep
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