PCBA (Printed Circuit Board Assembly)

Cold soldering is a prevalent issue in PCBA production, often caused by improper SMT process settings or defective electronic components. Recently, SYS Technology encountered widespread cold soldering in a customer's board, primarily affecting specific components. Investigation revealed that the components had been long-stored in inadequate conditions, leading to moisture damage that hindered proper soldering. Following communication with the customer, SYS Technology re-processed the affected boards, reaffirming its commitment to addressing customer issues and ensuring material quality in the PCBA process. Read More

In a finished Printed Circuit Board Assembly (PCBA), Surface Mount Technology (SMT) components are mounted directly onto the PCB. Proper placement of components in the signal chain—such as input sensors, microcontrollers, and outputs—helps maintain optimal performance by reducing trace lengths and minimizing noise, resistance, capacitance, and inductance. The power supply circuit is typically placed first, followed by the implementation of a modified star configuration for routing power traces. In this configuration, each circuit section (e.g., RF, microcontroller, op amp) has its own dedicated trace from the regulator, reducing noise and preventing voltage drops across the circuit. Careful planning is required, especially with two-layer boards, to ensure efficient trace routing and component placement. Read More

With the advancement of innovative technologies, PCB manufacturers have enhanced printed circuit board assembly by adopting surface-mount technology (SMT). SMT is now the predominant method for electronic circuit board production due to its smaller size, improved performance, and compatibility with automated assembly using pick-and-place machines, minimizing the need for manual intervention. Unlike traditional wired components, which required manual placement due to their complex fitting requirements, SMT allows for almost entirely automated assembly. PCB assembly services provide a cost-effective way to update electronic devices rather than purchasing new ones. SMT production is mainly carried out in cleanroom environments that are ESD-safe to protect sensitive components from static damage. Shenzhen, China, is a major hub for electronics manufacturing, offering a wide range of components and assembly services at competitive prices, helping to reduce costs for PCB and PCBA sourcing. Read More

Surface-mount technology (SMT) is a method for constructing electronic circuits where components are directly mounted onto a PCB's surface using solder pads made of tin-lead, silver, or gold-plated copper. The connection between the PCB and components relies on the quality of these solder joints. The longevity of PCBA boards depends on proper maintenance. A Shenzhen-based PCB manufacturer recommends a semi-annual maintenance routine that includes cleaning dust with special fluid, drying the board, and checking components for overheating or leakage. Annual maintenance should include dust cleaning, testing electrolytic capacitor capacity, replacing old or damaged capacitors, and reapplying thermal grease to high-power devices to ensure effective heat dissipation and prolong the board's lifespan. Read More