PCB dimension tolerance refers to the PCB manufacturing process, due to a variety of reasons resulting in the actual size and design size of the deviation between the range. The size of this tolerance range directly affects the PCB assembly accuracy, electrical performance and the reliability of the final product. Therefore, strict control of PCB […]
Parasitic capacitance is virtual capacitance (usually unnecessary) between two conductive structures separated by an insulator. It is an effect in PCB layout, where the propagating signal behaves as if it is a capacitor, but it is not a real capacitor. Parasitic capacitance usually occurs between any pair of conductors separated by a dielectric. These capacitances
Soldermask, as a thin layer of polymer, serves the primary purpose of protecting the copper layer on a circuit board from the risk of oxidation and short circuiting during manufacture and use. At the same time, it provides the PCB with an additional layer of environmental barrier. The thickness of the soldermask is usually closely
PCB via filling technology mainly refers to the use of specific filler materials to fill through holes (such as through holes, mounting holes, etc.) in the PCB manufacturing process, in order to realize the electrical connection between the layers of the circuit board or structural fixation. The selection of filler materials and the control of
During the PCBA processing process, some electronic components with poor welding are often encountered. Desoldering is required during the adjustment and maintenance process, or when electronic components are replaced due to incorrect welding. In the face of such electronic components, we generally remove the wrongly welded electronic components without damaging the PCB board. If the
Flex cut technology usually refers to the use of lasers or high-precision mechanical tools to cut circuit boards made of flexible materials (e.g. polyimide, etc.). This technology is known for its high precision, efficiency and flexibility to meet the needs of cutting complex shapes and small sizes. This technology typically uses a laser or mechanical
Automatic soldering is the process of welding using automated equipment and robots. Automated welding offers significant advantages over manual welding. Due to the precision and stability of automated equipment, automated welding can significantly improve the consistency and quality of welds. This means that consistent quality is maintained in every welded joint, which reduces the likelihood
Circuit board in the process of use, often appear pad off, especially in the circuit board repair time, in the use of soldering iron, it is very easy to appear pad off the phenomenon, in this paper on the pad off some analysis of the reasons, and how to fix pcb solder pads put forward
Metal Core PCB is a special type of printed circuit board, whose substrate material is metal instead of common glass fiber reinforced plastic. Metal Core PCBs are usually made of aluminum, copper or magnesium alloy, among which aluminum and copper are the most commonly used materials. Metal Core PCBs have been increasingly used in hybrid
PCB microsection is a technology that utilizes high-precision equipment and a special process to make fine cuts on circuit boards. Compared with traditional cutting methods, microsection technology has higher precision and a smaller error margin, enabling precise cutting of tiny components and fine lines on circuit boards. Anatomical destructive slicing methods for circuit boards can
Definition of copper corrosion:It is a phenomenon in which copper reacts with chemicals or gases in the surrounding environment under specific conditions, resulting in oxidation, corrosion or deterioration of the copper surface. This reaction may lead to a reduction in the surface quality of the copper material, a decrease in electrical conductivity, or even an
BGA technology (Ball Grid Array Package) that is the ball grid array packaging technology, is about the early 1990’s by the United States Motorola and Japan Citizen jointly developed high-performance packaging technology, BGA IC is in the back of the substrate according to the array way to make a ball contact as a pin, in
FR4 is a commonly used PCB substrate materials, it is “flame retardant” (Flame Retardant) level 4 of the glass fiber reinforced epoxy resin material abbreviation. Flame Retardant (Flame Retardant): Flame Retardant refers to the ability of a material to slow down the propagation of flame or self-extinguish when subjected to flame, thus reducing the risk
What is the relation between resistance and current?In a circuit system, the power supply is responsible for providing the potential difference that allows current to flow in the circuit. The current passes through a resistor which causes a voltage drop and eventually returns to the power supply. According to Ohm’s law, current is inversely proportional
The solder ball reflow process is a commonly used surface mount technology. It can realize the soldering function by heating and melting the solder ball and connecting it to the solder joints on the substrate, and can be widely used in electronic products to improve the reliability of the connection, save space, and facilitate the
PCB as an important part of electronic equipment, its quality and reliability requirements are increasing. pcb testing is a complex and critical link, involving the application of a variety of technologies and pcb testing methods, but also need to consider a number of factors in the design process. 7 PCB Testing Techniques Flying probe test
PCB substrate key components in the electronics field that utilize chemical etching technology to connect electronic components (e.g., wires, resistors, capacitors, etc.) to copper foil to form a complete circuit system. This technology allows for the smooth transmission of signals and currents between electronic components, thus ensuring the proper functioning of electronic devices. Packaged substrates
Wafer Level Packaging (WLP) is an advanced packaging technology that has developed rapidly in recent years due to its advantages of small size, excellent electrical performance, good heat dissipation and low cost. Different from the traditional packaging process, wafer level packaging is in the chip is still on the wafer when the chip is encapsulated,
PCB color is mainly determined by its substrate on the soldermask layer, the main role of the soldermask layer is to prevent welding solder flow freely, to avoid causing short circuits. The color of the soldermask can be achieved by adding different color materials, thus forming the colorful PCB boards we see. The relationship between
Laser engraving pcb board is a kind of efficient and precise printed circuit board processing equipment, which adopts the laser technology, can carry out high-precision engraving, laser engraving, etc. on the surface of PCB, so as to realize the marking, marking, layout, cutting and other processing of the circuit board, which provides important technical support
CPU packaging technology refers to the packaging and encapsulation of integrated circuit chips to protect the chip from the external environment, and to facilitate the installation and maintenance of the CPU chip as one of the core components of the computer, packaging technology is of great significance to improve the reliability of the CPU, reduce
PCB stiffener is a type of sheet used to enhance the structural strength and stability of circuit boards. It is usually made of high-strength, high-rigidity materials, such as metal or special plastics. By pasting or fixing it on the key parts of the circuit board, PCB stiffener can effectively improve the overall strength and bending
Electroplating copper is a thin film of copper plated on the surface of other materials, usually by electrolytic deposition. Pure copper is a material made entirely of copper, and the higher the purity, the better the electrical properties. Electroplating is the process of plating a thin layer of a specific metal or alloy on a
Fix pcb board is a critical part of ensuring the proper functioning of electronic equipment. Once the circuit board failure, may lead to equipment performance degradation, abnormal function or even unusable. Timely and accurate repair can restore the normal function of the circuit board, improve the stability and reliability of the equipment, and extend its
