+86 755 2794 4155 
sales@knownpcb.com
PCB Silk Screen PCB silk screen is a crucial process in the manufacturing of printed circuit boards. It involves applying a thin layer of ink or epoxy-based material onto the surface of the PCB. The main purpose of the silk screen is to provide visual information and identification. It is used to print component designators, reference numbers, logos, and other text or graphical elements. Component designators help assemblers easily identify and place the correct components on the PCB during the assembly process. For example, a resistor might be labeled with "R1" or "R2" to distinguish it from other components. The silk screen also plays a role in providing instructions and warnings. Some PCBs may have silkscreened text that indicates the correct orientation of components, such as "Top" or "Bottom" markings. Additionally, safety warnings or handling instructions can be printed. The quality of the silk screen is important. It should have good adhesion to the PCB surface to prevent th
PCB solder mask is a vital component in the PCB manufacturing process. It is a thin layer of polymer material that is applied to the surface of the PCB, covering the copper traces and pads, except for the areas where soldering is intended to occur. The primary function of the solder mask is to prevent solder from bridging between adjacent pads or traces during the soldering process. This helps to ensure that each component is soldered accurately and separately, reducing the risk of short circuits. The solder mask also provides protection to the copper circuitry. It shields the copper from oxidation, moisture, and other environmental factors that could degrade its performance over time. This protection is crucial as it helps to maintain the integrity of the electrical connections on the PCB. the solder mask can have different colors, which can be used for aesthetic purposes or to provide visual contrast for easier inspection and identification of components. For example, a green so
Mixed - signal PCBs are a complex and crucial part of modern electronic design. These PCBs handle both analog and digital signals simultaneously, presenting unique challenges and opportunities. In the design of mixed - signal PCBs, one of the primary concerns is signal isolation. Since analog signals are sensitive to noise and interference from digital signals, proper separation techniques are essential. This often involves using physical barriers such as ground planes or isolation trenches. Ground planes act as a reference for signals and help in reducing electromagnetic interference. Isolation trenches, on the other hand, are created by etching away the substrate material between different signal areas to prevent crosstalk. For example, in a mixed - signal PCB for an audio - processing device, the analog audio signals must be kept free from the digital control signals to maintain high - quality sound reproduction. Component placement also plays a vital role. Analog components,
The Influence of Surface Treatment Materials on PCBs Surface treatment materials have a profound impact on the performance, reliability, and lifespan of PCBs. Different surface treatment methods are employed to meet various requirements in the electronics industry. One of the most common surface treatment materials is HASL (Hot Air Solder Leveling). HASL involves coating the PCB surface with a thin layer of solder alloy using hot air. This treatment provides excellent solderability as the solder layer allows for easy formation of reliable solder joints. It also offers good protection against oxidation during the storage and assembly process of the PCB. However, HASL has some limitations. The thickness of the solder layer may vary, which can affect the precision of fine pitch components. Additionally, the process may leave some residues that need to be carefully cleaned to avoid potential short circuits. Another widely used surface treatment is OSP (Organic Solderability Preservati
Solder Resistant Ink for PCB Materials Solder resistant ink is an indispensable component in the field of PCB (Printed Circuit Board) manufacturing. It plays a crucial role in defining the quality and functionality of the PCB. The primary function of solder resistant ink is to protect the copper circuits on the PCB from oxidation. Copper is highly susceptible to oxidation when exposed to air or certain chemical environments. The solder resistant ink forms a protective layer over the copper traces, preventing the formation of copper oxides. This is vital because oxidized copper can lead to poor solderability, which in turn affects the reliability of the electrical connections during the soldering process. For example, if the copper is oxidized, the solder may not adhere properly, resulting in weak joints that can cause electrical failures such as open circuits or intermittent connections. Moreover, solder resistant ink helps in achieving precise and clear circuit patterns. It has e
1. Introduction to PCB Plug - in Services PCB plug - in services are an essential part of the electronics manufacturing process. These services involve the insertion of components into printed circuit boards (PCBs) through various techniques, ensuring proper electrical and mechanical connections. 2. Types of Plug - in Components Through - hole Components Through - hole components are one of the traditional types of components inserted into PCBs. These components have leads that pass through holes drilled in the PCB. For example, resistors, capacitors, and some connectors are often through - hole components. Inserting through - hole components requires precise alignment of the leads with the holes. The leads are then soldered on the other side of the board to create a permanent electrical connection. The diameter of the holes and the length of the component leads need to be carefully matched. For example, a standard resistor may have leads of a specific length, and the holes in
Large - sized PCB Specification Parameters 1. Introduction to Large - sized PCBs Large - sized printed circuit boards (PCBs) are used in applications where a significant amount of circuitry needs to be integrated onto a single board. These are commonly found in industrial control systems, high - end servers, and large - scale communication equipment. 2. Physical Dimensions and Mechanical Properties Size and Shape Large - sized PCBs can have dimensions that are several feet in length and width. For example, in some industrial automation systems, the PCB may be as large as 24 inches by 36 inches or even larger. The shape of the PCB can also vary, including rectangular, square, or custom - shaped boards depending on the specific application requirements. The thickness of large - sized PCBs is also an important parameter. Thicker boards are often used to provide mechanical strength and stability. The thickness can range from 1.6mm to 6.4mm or more. This thickness is necessary to su
Micro - sized PCB Specifications 1. Introduction to Micro - sized PCBs Micro - sized printed circuit boards (PCBs) play a crucial role in modern electronics, especially in devices where space is at a premium. These PCBs are used in a wide range of applications, from miniature sensors in wearable devices to components in high - density smartphones. 2. Physical Dimensions and Layout Size Constraints Micro - sized PCBs typically have very small dimensions. For example, their length and width can range from a few millimeters to a few centimeters. In some cases, such as in medical implants or extremely small IoT devices, the PCB may be as small as a few square millimeters. These small sizes require precise manufacturing techniques to ensure that all components can be placed and connected accurately. The thickness of micro - sized PCBs is also carefully controlled. Thinner PCBs are often preferred in applications where overall device thickness needs to be minimized. The thickness can
Printer PCB A printer PCB is a vital part of a printer that controls and coordinates the various functions and operations of the printing process. It plays a crucial role in ensuring the accurate and efficient transfer of data and commands to the different mechanical and electrical components within the printer. The printer PCB is responsible for several important tasks. Firstly, it manages the communication between the printer and the computer or other devices from which the print job is received. It interprets the incoming data and converts it into the appropriate signals to control the movement of the printhead, the feeding of the paper, and the activation of other printer mechanisms. For example, in an inkjet printer, the PCB controls the precise ejection of ink droplets from the printhead based on the image data received. The design of the printer PCB needs to consider factors such as signal integrity and noise reduction. High-speed data transfer is often required in modern p
PCB Reliability Test PCB (Printed Circuit Board) reliability test is crucial for ensuring the performance and durability of electronic devices. These tests are designed to evaluate the ability of PCBs to withstand various environmental and operational stressors over time. One of the key aspects of PCB reliability testing is thermal stress testing. This involves subjecting the PCB to extreme temperatures, both high and low, to simulate the conditions it may encounter in different applications. For example, a PCB in an automotive engine compartment may be exposed to high temperatures, while a PCB in an outdoor telecommunications equipment may experience extreme cold. By testing the PCB under these temperature extremes, potential weaknesses such as delamination, solder joint failures, and component degradation can be identified. Another important reliability test is mechanical stress testing. This includes vibration testing, shock testing, and bend testing. Vibration testing simulate
PCB Gold Plating Gold plating on printed circuit boards (PCBs) is a common surface finish that offers several advantages. This process involves depositing a thin layer of gold onto the copper traces and pads of the PCB. One of the main benefits of gold plating is its excellent electrical conductivity. Gold is a highly conductive metal, which helps to reduce signal loss and improve the performance of high-frequency and high-speed circuits. It also has a low contact resistance, ensuring reliable electrical connections. Another advantage of gold plating is its corrosion resistance. Gold is highly resistant to oxidation and corrosion, protecting the copper traces on the PCB from environmental factors such as moisture, chemicals, and temperature changes. This makes gold plating suitable for use in harsh environments or applications where long-term reliability is required. Gold plating also offers good solderability. The gold layer provides a clean and stable surface for soldering, ens
Computer PCB The printed circuit board (PCB) in a computer is the backbone of the entire system. It provides the electrical connections and pathways for all the components to communicate and work together. The design of a computer PCB is a highly complex and specialized process. It involves careful consideration of factors such as component placement, signal routing, power distribution, and heat dissipation. The PCB must be able to handle the high speeds and large amounts of data that are processed by modern computers while also providing a stable and reliable platform for the components to operate. One of the key features of a computer PCB is its multilayer construction. This allows for the integration of multiple electrical layers, which can be used to route signals, power, and ground. The multilayer design also helps to reduce interference and improve signal integrity. In addition to the electrical components, a computer PCB may also include mechanical features such as mountin
Low signal loss PCB Low signal loss PCBs are of great significance in the field of electronic communication. In electronic devices, the quality of signal transmission directly affects the performance and reliability of the equipment. Low signal loss PCBs can minimize signal attenuation during transmission, ensuring signal strength and integrity. When signals are transmitted on a PCB, they are affected by various factors and experience losses. Among them, the resistance of the conductor, the dielectric constant and loss tangent of the medium, as well as the layout and length of the circuit, are all important factors affecting signal loss. Low signal loss PCBs reduce signal loss by optimizing these factors. In terms of material selection, low signal loss PCBs usually use low loss dielectric materials and high conductivity conductor materials. For example, some high-performance resin materials and special copper foils are widely used in manufacturing low signal loss PCBs. These mate
High temperature resistant PCB High temperature resistant PCBs play an important role in some special application scenarios. In many industrial and electronic fields, equipment needs to operate in high-temperature environments. For example, in environments such as car engine compartments, aerospace equipment, and industrial furnaces, temperatures can reach several hundred degrees Celsius. In these high-temperature environments, ordinary PCBs may fail due to thermal expansion, softening, or decomposition of materials. High temperature resistant PCBs can maintain stable performance at high temperatures, ensuring the normal operation of equipment. High temperature resistant PCBs typically use special materials and manufacturing processes to achieve their high temperature resistance performance. In terms of materials, we will choose substrates with high heat resistance, such as polyimide, ceramics, etc. These materials can maintain good mechanical strength, insulation performance, and
Flexible PCB A flexible PCB (Printed Circuit Board), also known as a flexible board, is a type of circuit board with high flexibility. Flexible PCBs are typically composed of insulating substrate materials and conductive layers. The insulation base material generally uses materials with good flexibility and insulation properties such as polyimide (PI) and polyester film (PET). The conductive layer is made of metal materials such as copper foil, and a circuit pattern is formed through etching and other processes. The main feature of flexible PCB is its good flexibility, which can bend, fold, and even twist, adapting to various complex shapes and space requirements. This gives it unique advantages in many fields. For example, in electronic devices such as smartphones and tablets, flexible PCBs can bend according to the shape of the device, achieving more compact design and better space utilization. In wearable devices, flexible PCBs can adapt to human movement and bending, providing
Rigid flexible combination PCB Rigid flexible PCB is a new type of circuit board that combines rigid PCB and flexible PCB together. The rigid flexible PCB combines the stability of a rigid PCB with the flexibility of a flexible PCB, and has many unique advantages. Structurally, it typically consists of rigid and flexible parts. The rigid part provides a platform for supporting and installing electronic components, while the flexible part can be bent and folded to achieve the connection and signal transmission of electronic devices. The application range of rigid flexible PCB is very wide. In electronic devices such as smartphones and tablets, the combination of rigid and flexible PCBs can achieve the connection between the display screen and the motherboard, while adapting to the lightweight design requirements of the device. In medical devices, rigid flexible PCB can be used for implantable devices and portable detection devices, providing reliable signal transmission and stable
Ceramic substrate PCB is a high-performance electronic substrate material that plays an important role in the field of electronics. Ceramic substrates are mainly made of ceramic materials and have many unique performance advantages. Firstly, ceramic materials have extremely high insulation properties, which can effectively prevent leakage and short circuits between circuits, ensuring the safe operation of electronic devices. Secondly, ceramic substrates have excellent thermal conductivity, which can quickly dissipate the heat generated by electronic components, reduce the operating temperature of components, and improve the reliability and stability of equipment. In addition, ceramic substrates also have good mechanical strength and corrosion resistance, and can withstand harsh environments such as high temperature, high pressure, and high humidity. In terms of performance, ceramic substrate PCBs have demonstrated outstanding characteristics. Firstly, it has extremely high wiring
Double sided PCB is a type of circuit board widely used in the electronics industry, which has many unique advantages and features. A double-sided PCB consists of two layers of insulating substrates and two layers of conductive copper foil. Two layers of conductive copper foil are connected through vias to form a complex circuit network. This structure enables double-sided PCB to achieve more complex circuit designs, meeting the high-performance and multifunctional requirements of modern electronic devices. In terms of design, double-sided PCB provides more layout space and flexibility. Designers can arrange different circuit components and circuits on both sides, fully utilizing the space of the circuit board to achieve a more compact design. Meanwhile, the use of vias makes circuit connections more convenient, enabling signal transmission and power distribution between different layers. In terms of production process, double-sided PCB is relatively more complex. Firstly, circu
Rigid PCB (Printed Circuit Board) is the most common type of circuit board in electronic devices. Rigid PCBs are typically made from copper-clad laminates (CCL) as the substrate and processed through a series of techniques. It has high mechanical strength and stability, and can work reliably in various harsh environmental conditions. One of the main characteristics of a rigid PCB is its fixed shape and size. Once completed, the rigid PCB will not easily deform, making it very suitable for installing various electronic components and conducting complex circuit layouts. At the same time, the mechanical strength of rigid PCBs also enables them to withstand certain external impacts and vibrations, ensuring the stability and reliability of electronic devices during use. In terms of electrical performance, rigid PCBs perform well. It can provide good conductivity and insulation performance, ensuring stable transmission of circuit signals. In addition, rigid PCBs can achieve good elect
Raw materials for PCB Copper clad laminate is a substrate material used in the production of printed circuit boards. It is used to support various components and can achieve electrical connections or insulation between them. PCB is a printed circuit board (PCB), which is simply a thin plate containing integrated circuits and other electronic components. It almost appears in every electronic device. According to a recent report by Time magazine, China and India are among the most polluted countries in the world. To protect the environment, the Chinese government has been strictly formulating and implementing pollution control measures, which have affected the PCB industry. Many towns are no longer allowing the expansion and construction of new PCB factories, such as Shenzhen Jingbang Technology Co., Ltd. in Majialong Industrial Zone, Nanshan District, which has a small amount and mainly relies on high-precision manual labor, and outside the city, which mainly relies on mass equipment
About Us Product Center Capabilities&Applications Quality Assurance News Contact Us
ISO 9001:2008 registered © 2022 Shenzhen Knownpcb Technology Co., Ltd. All Rights
Reserved ICP: 粤ICP备08036040
Inquiry Now
EN
CN
中文
Home > 
