Category Archives: Uncategorized

At present, the main products of SMT patch are: lead-free soldering process, lead soldering process and red glue soldering process. And its point calculation method is very similar, but many users don’t know much about the calculation of SMT patch points and how to calculate the cost. Some companies calculate one pad as one point, […]

PCB circuit boards are widely used in China, and pollutants will be generated during the manufacturing process of printed circuit boards, including residues of flux and adhesives and other pollutants in the manufacturing process such as dust and debris. If the pcb board cannot effectively guarantee the clean surface, the resistance and leakage will cause […]

1. FR-4 board is an epoxy board with high mechanical and dielectric properties, good heat resistance and moisture resistance, and good machining properties. 2. The aluminum substrate is a metal-based copper-clad laminate with good heat dissipation function. Generally, a single-sided board is composed of a three-layer structure, which is a circuit layer (copper foil), an […]

  In ICT testing, test probes are used to contact test points on the PCBA board, which can detect short circuit, open circuit, and component welding faults. It can quantitatively measure resistance, capacitance, inductance, crystal oscillator and other devices, perform functional tests on diodes, transistors, optical couplings, transformers, relays, operational amplifiers, power modules, etc., and […]

1. Regulations for static electricity protection in SMT patch processing and production. In SMT patch processing and production, all electrostatic sensitive components must be stored in a container with anti-static measures, such as an anti-static bag. Effective electrostatic protection measures must be implemented when contacting electrostatic sensitive components and products in SMT patch processing, including […]

1. Electronic Manufacturing Service (EMS) and its development For EMS (Electronic Manufacturing Services), ODM and OEM have become the main models of OEM. About 40% of the world’s electronic products are produced through outsourcing, and this proportion will increase. However, the profit margin of OEM-based electronic product manufacturing services is getting lower and lower. In […]

Surface mount technology, also known as SMT, is a kind of electronic assembly technology, which originated in the 1960s and was initially developed by IBM in the United States, and then gradually matured in the late 1980s. This technology is to mount electronic components, such as resistors, capacitors, transistors, integrated circuits, etc., on a printed […]

The short-circuit in SMT chip processing often occurs between the pins of fine-pitch ICs, so it is also called “bridging”. Of course, there are also very few short-circuits between CHIP parts. Now let’s talk about the reason and solution of the bridging problem between fine-pitch IC pins.   The bridging phenomenon mostly occurs between IC […]

The proportion of paste flux in the solder paste is generally 10% to 15%, and the volume percentage is 50% to 60%. As a solder powder carrier, it acts as a bonding agent, flux inhibitor, rheology control agent and suspending agent. It is composed of resin, activator (surfactant, catalyst), thixotropic agent, flux and additives. The […]