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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
A universal circuit magic board, consisting of a circuit experimental board and circuit components, characterized in that the circuit experimental board (for the sake of specific explanation, electronic circuits are used as examples below) is composed of a double-layer single-sided (or double-sided) printed circuit board of the same size (hereinafter referred to as the printed board), circuit component sockets (such as integrated component sockets, hereinafter referred to as sockets), and pins, A socket is welded into a metalized hole in a printed circuit board that is separated and insulated between the upper and lower layers. On the upper and lower sides centered on the horizontal centerline of the socket, a horizontal line parallel to the horizontal centerline of the socket is printed on the lower layer printed circuit board (or upper layer printed circuit board), and a vertical line perpendicular to the horizontal center of the socket is printed on the upper layer printed circu
PCB board fixture is a detection device for PCB boards, especially a fixture for PCB board detection. There is a fixed seat set on the machine base that can slide back and forth, a front gear lever and a rear gear lever set on the fixed seat. The front gear lever is fixedly connected to the fixed seat, and the rear gear lever is slidably connected to the fixed seat. The front gear lever is equipped with a PCB board clamp head composed of a warping plate and a top plate, and the middle part of the PCB board clamp head is connected to the front gear lever pin, and a top rod device is set at the front end of the machine base, The top rod device is composed of a base fixed on the machine base and a top rod set on the base. When the fixed base moves to the forefront, the top rod of the top rod device contacts the top plate. The utility model has a simple structure and can conveniently and quickly clamp the PCB board, improving work efficiency. At the same time, the clamping of the PCB b
Panel length: 330mm Overall dimensions: 700 x 230 x 420 Panel thickness: 0.3-3.5 mm Machine weight 165kg 1. Fully pneumatic control, no noise 2. Small travel, less prone to product damage, and safe operation 3. Tailored work, suitable for various thicknesses of PCB 4. Minimize the internal stress generated during plate cutting to avoid tin cracking 5. The distance between the upper and lower knives can be accurately adjusted, avoiding tool loss due to different depths of the V-groove 6. The highest part at the edge of the separable V-groove is 70mm
Computer and peripherals: motherboard, monitor, network card, memory card, IC, mouse, router, camera, USB drive, fan motor, game console, game card board (gold finger board) Mobile phone: mobile phone board, charger electronic anti-theft lock audio, printer, copier, fax machine, phone, scanner monitoring system, video head DV, camera meter board Automotive products: Sensors for various machines such as car audio, air conditioning switches, control system lighting fixtures, LED panels (LCD displays, LCD billboards) Bathroom equipment: motors, controllers, switches, and high-end PCB boards in industries such as medical equipment, military equipment, aerospace equipment, etc
Double-sided PCB board is a very important type of PCB board in the circuit board market. There are double-sided circuit boards with metal base, Hi Tg heavy copper foil circuit boards, flat and winding double-sided circuit boards, high-frequency PCBs, mixed dielectric base high-frequency double-sided circuit boards, etc. It is suitable for a wide range of high-tech industries such as telecommunications, power supply, computers, industrial control, digital products, scientific and educational instruments, medical equipment, automobiles, aerospace defense, etc. Double-sided printed boards are usually made of epoxy glass cloth copper foil. It is mainly used for communication electronics with high performance requirements Equipment, advanced instruments and electronic computers, etc. The production process of double-sided boards is generally divided into several types: process wire method, hole blocking method, masking method, and graphic electroplating etching method. The process f
Square solder pads are commonly used when the components on a printed board are large but few, and the printed wires are simple. When manually making PCBs, using this type of solder pad is easy to achieve. Circular pad - widely used in single and double-sided printed boards with regular component arrangement. If the density of the board allows, the solder pad can be larger to prevent detachment during welding. Island shaped pad - The connection between the pad and the pad is integrated. Commonly used in vertical irregular arrangement installation. For example, this type of pad is often used in tape recorders. Teardrop solder pads - often used when the wire connecting the pads is thin to prevent peeling and disconnection of the wire from the pads. This type of pad is commonly used in high-frequency circuits. Polygonal pad - used to distinguish pads with similar outer diameters but different apertures, making it easy to process and assemble. Elliptical pads - These pads have suff
Copper clad panels were truly adopted on a large scale in PCB production, first appearing in the US PCB industry in 1947. The PCB substrate material industry has also entered its early stage of development. During this stage, the manufacturing technology progress of the raw materials used in the manufacturing of substrate materials - organic resins, reinforcing materials, copper foil, etc. - provides a strong driving force for the development of the substrate material industry. As a result, the manufacturing technology of substrate materials is gradually maturing. The invention and application of integrated circuits, as well as the miniaturization and high-performance of electronic products, have pushed PCB substrate material technology onto the track of high-performance development. The rapid expansion of demand for PCB products in the world market has led to rapid development in the production, variety, and technology of PCB substrate materials. At this stage, a broad new field
1. Drilling machine: used for drilling circuit boards. 2. Nailing machine: Fix or stack one or more double-sided boards with pipe position nails to facilitate positioning during drilling. 3. Grinding drill bit machine: The drill bit used for grinding and drilling. 4. Up and down rubber granulator; Fix the length of the rubber particles dropped from the drilling nozzle at 0.800 "± 0.005" for use by the drilling rig, or remove the rubber particles from the drilling nozzle. 5. Nail withdrawing machine; Use double-sided board drilling to retract pipe position nails. 6. Drilling machine: Used for drilling pipe position holes on the bottom plate.
1.1. When the cutting machine is turned on, do not reach into the machine. 2.2. Flammable materials such as paper should not be placed next to the oven to prevent fires. 3.3. The temperature setting of the oven must not exceed the specified value. 4.4. Asbestos gloves must be worn when removing boards from the oven, and the boards must be removed after they have cooled down. 5.5. Dispose of waste materials strictly according to the method specified in MEI001 to prevent environmental pollution. Cutting board 1. Equipment: manual plate cutting machine, target milling machine, CCD Hole punch, gong machine, edging machine, word marking machine, thickness gauge; 2. Function: Laminate shape processing, preliminary forming; Process: Dismantling board → Dotting and drawing lines → Cutting large board → Milling copper skin → Punching → Forming gong edge → Grinding edge → Typing mark → measuring plate thickness
1、 Purpose: Cut large pieces of sheet metal into small pieces of various required specifications. 2、 Process flow: 3、 Equipment and function: 1. Automatic cutting machine: Cut large materials into various fine materials. 2. Rounding machine: Grind the dust ends of the plate corners to a round shape. 3. Washing machine: Clean and air dry the dust and impurities on the board machine. 4. Oven: Furnace board to improve the stability of the board material. 5. Word marking machine; Type a label on the edge of the board for marking. 4、 Operating specifications: 1. Before starting the automatic feeding machine, check the set size to prevent incorrect feeding. 2. After cutting the inner layer board, attention should be paid to adding marks to separate the materials horizontally and vertically, and avoid confusion. 3. When handling the board, gloves should be worn and handled with care to prevent scratching the board surface. 4. After washing the board, it is necessary to pay at
The drill types of PCB drill bit control drilling machine: the drill bits for PCB drilling include straight shank Fried Dough Twists drill, fixed shank Fried Dough Twists drill and fixed shank shovel drill. Straight handle Fried Dough Twists drills are mostly used for single head drilling machines to drill simple printed boards or single panels. Now they are rarely seen in large printed board manufacturers, and their drilling depth can reach 10 times the drill diameter. When the substrate layer is not high, using a drill sleeve can avoid drilling deviation. At present, most manufacturers use CNC drilling machines, which use fixed shank drill bits made of hard alloy and can achieve automatic replacement of drill bits. High positioning accuracy, no need to use drill sleeves. Large helix angle, fast chip removal speed, suitable for high-speed cutting. Within the full length range of the chip removal groove, the diameter of the drill bit is an inverted cone, resulting in less friction
1. The ideal adhesive layer thickness for bonding is 0.01-0.05mm, and either too thin or too thick can affect the bonding performance. 2. Ensure that the adhesive layer absorbs sufficient ultraviolet energy to achieve the best curing effect, otherwise it may affect the adhesive performance of the adhesive layer. 3. Do not move the material back and forth when exposed to ultraviolet radiation, otherwise it may cause the adhesive layer to turn white and the bonding strength to decrease. 4. The remaining glue should not be returned to the original packaging, and should be stored at room temperature and sealed away from light, avoiding contact with children. 5. This product has slight irritation to the eyes and skin. If it accidentally splashes into your eyes, please rinse immediately with plenty of water. If in contact with skin, Rinse with soap. If the situation is serious, please see a doctor. It is recommended that the glue applicator wear professional UV resistant glasses and
① The 1000 series represents the 1050, 1060, and 10701000 series aluminum plates, also known as pure aluminum plates. Among all the series, the 1000 series has the highest aluminum content, with a purity of over 99.00%. Due to the absence of other technical elements, the production process is relatively simple and the price is relatively cheap, making it the most commonly used series in conventional industries. The majority of the products circulating in the market are the 1050 and 1060 series. The minimum aluminum content of the 1000 series aluminum plate is determined based on the last two digits. For example, the last two digits of the 1050 series are 50. According to international brand naming principles, the aluminum content must reach 99.5% or above as a qualified product. In China's aluminum alloy technical standard (GB/T3880-2006), it is also explicitly stipulated that the aluminum content of 1050 should reach 99.5%. The same principle applies to 1060 series aluminum plates
Audio devices Input and output amplifiers, balanced amplifiers, audio amplifiers, preamplifiers, power amplifiers, etc. Power supply equipment Switch regulator, DC/AC converter, SW regulator, etc. Communication electronic equipment High frequency amplifier, filtering device, and reporting circuit. Office automation equipment Motor drivers, etc. automobile Electronic regulators, igniters, power controllers, etc. computer CPU board, floppy drive, power device, etc. Power module Inverter, solid-state relay, rectifier bridge, etc. Lamps Lighting With the promotion of energy-saving lights, various energy-saving and colorful LED lights have become popular in the market, and aluminum substrates used for LED lights have also begun to be widely used
Material: Plastic; It can effectively release the static charges accumulated on the surface of the object, so that it does not generate charge accumulation and high potential difference; It has multiple advantages such as toughness, wear resistance, moisture and corrosion prevention, thermal insulation and shock resistance, economy and durability. The anti-static turnover rack can greatly reduce the damage rate of electronic products during the production process, reduce costs, and improve product quality and profits; The main purpose of the anti-static turnover rack is to eliminate static electricity, and it is widely used for the turnover loading and storage of PCB boards during the production process. Resistance value: below the 6th power of 10; L-shaped turnover rack, also known as PCB board turnover rack, is widely used in SMT processing, machinery, automobiles, home appliances, light industry, electronics and other production enterprises. It is acid and alkali resistant, oil
PCB double -sided rigid printed board Double -sided rigid version → double -sided copper covered plate → feeding → stack board → CNC diamond guide pores → test, removing burr brush → chemical plating (metal of guide holes) → (full board electroplating thin copper) → inspection brush → Net Printing circuit graphics, curing (dry membrane or wet film, exposure, development) → inspection, repair board → line graphics electroplating → electroplating (anti -nickel/gold) → de -printed (sensor) → etching copper → (( Retirement) → Clean brush → Net printing and welding graphics commonly used thermal solidification green oil (light -sensitive dry film or wet film, exposure, development, thermal solidification, commonly used sensor thermal solid green oil) → cleaning, drying → net print marking character graphics graphics graphics graphics graphics graphics graphics graphics , CITC → (spray tin or organic welding film) → Machining → cleaning, drying → electrical interrupt detection → inspectio
PCB process flow chart It can be seen from the process flowchart that the multi -layer board process is developed on the basis of double -faced metal chemical technology. In addition to the two -sided process, it also has several unique contents: the inner layers of metalized holes, drilling and removing epoxy drilling, positioning system, layer pressure, and special materials. Our common computer board card is basically a two -sided printed lineboard of epoxy resin glass, one of which is the other side of the installation element and the other side of the component foot welding surface. The component foot divide vertical welding surface we call it as a pad. Why don't other copper -guided line figures not on tin? In addition to the pads and other parts of tin welding, the other parts have a layer of welded welding film. Most of its surface welded films are green, and a few use yellow, black, blue, etc. Therefore, in the PCB industry, welding oil is often called green oil. Its role
PCB surface installation 1) Because the printed board has eliminated a large number of large -guided pores or buried holes interconnect technology, the wiring density on the printing board is increased, and the area of the printed board is reduced (generally one of the three -pointers for inserted installation), and at the same time It can also reduce the number of design layers and costs of the printed board. 2) Reduce weight and improve seismic performance, and adopts glue welded and new welding technology to improve product quality and reliability. 3) Due to the increased wiring density and shortening the length of the lead, the parasitic capacitance and parasitic inductance are reduced, which is more conducive to increasing the electrical parameter of the printed board. 4) It is easier to automate more than the installation installation, improves the installation speed and labor productivity, and reduces the assembly cost accordingly. From the above surface safety technology
PCB printing 1. Live board printing There are many texts, few photos and pictures, there are many opportunities for changes in text, and the number of prints is not large -printed products between hundreds or thousands of printeds should be printed in live version. The number of divery printing should not exceed 30,000, and the fine picture electric version should not exceed 70,000 to 80,000. The printing pictures must be used to obtain a perfect outlet. Therefore, you cannot use cheap paper to print pictures and want to achieve exquisite results. When using the live version of the duct, the line of the line is easy to separate and disconnect, which is a common disadvantage. In addition, when the printing pressure is too large or the surface layer of the pressure cylinder is too soft, it will make the back of the finished product printing with relief, which will greatly reduce the quality of the print. 2. Silk net printing Because the screen printing and printing ink are particul
PCB generally includes 1. Program ID (PID, process handle): It is unique, and each process must correspond to a PID. PID is usually an integer number 2. Feature information: general subsystem processes, user processes, or kernel processes, etc 3. Process status: running, ready, blocked, indicating the current running status of the process 4. Priority: Indicates the priority size for obtaining CPU control 5. Communication information: a reflection of the communication relationship between processes, as the operating system provides communication channels 6. On site protection zone: used to protect blocked processes 7. Resource requirements and allocation control information 8. Process entity information, indicating the program path and name, whether the process data is in physical memory or in swap partitions (pagination) 9. Other information: work unit, workspace, file information, etc
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