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To prevent welding porosity in PCBA production
1. Bake PCBA substrates and components that have not been used for a long time and exposed to the air may contain moisture. Bake them after a period of time or before use to prevent moisture from affecting PCBA processing. 2. Solder paste Solder paste is also very important for the processing of ...Read more -
Downstream demand of PCB industry
Increased penetration of 5G and automotive electronics will bring long-term growth momentum to the PCB industry, but under the influence of the 2020 epidemic, the demand for consumer electronics and automotive PCBs will still decline, and the demand for PCBs in the 5G communications and medical f...Read more -
Common methods of circuit board maintenance
1. Appearance inspection method by observing whether the circuit board has scorched places, whether the copper plating is broken, whether there are smells on the circuit board, whether there are poor soldering places, whether the interfaces and gold fingers are black and white, etc. 2. General ...Read more -
What is the difference between vector signal and RF signal source?
The signal source can provide accurate and highly stable test signals for various component and system test applications. The signal generator adds an accurate modulation function, which can help simulate the system signal and perform receiver performance testing. Both the vector signal and the R...Read more -
Application Background of Flexible Electronics in RFID
Radio frequency identification (RFID) technology has the characteristics of complete information input and processing without manual contact, fast and convenient operation, rapid development, etc. It is widely used in production, logistics, transportation, medical treatment, food and anti-counter...Read more -
Thin-film Solar Cell
Thin film solar cell (thin film solar cell) is another specific application of flexible electronic technology. In today’s world, energy has become a topic of global concern, and China is not only facing energy shortages, but also environmental pollution. Solar energy, as a kind of clean ene...Read more -
What are the factors that affect PCB impedance?
Generally speaking, the factors that affect the characteristic impedance of the PCB are: dielectric thickness H, copper thickness T, trace width W, trace spacing, dielectric constant Er of the material selected for the stack, and thickness of the solder mask. In general, the greater the dielectri...Read more -
Why need to cover with the gold for the PCB
1. Surface of PCB: OSP, HASL, Lead-free HASL, Immersion Tin, ENIG, Immersion Silver, Hard gold plating, Plating gold for whole board, gold finger, ENEPIG… OSP: low cost, good solderability, harsh storage conditions, short time, environmental technology, good welding, smooth… HASL: usually it’s mu...Read more -
Classification of resistors
1. Wire wound resistors: general wire wound resistors, precision wire wound resistors, high power wire wound resistors, high frequency wire wound resistors. 2. Thin film resistors: carbon film resistors, synthetic carbon film resistors, metal film resistors, metal oxide film resistors, che...Read more -
Varactor diode
The varactor diode is a special diode specially designed according to the principle that the junction capacitance of the “PN junction” inside the ordinary diode can change with the change of the applied reverse voltage. The varactor diode is mainly used in the high-frequency modulatio...Read more -
Inductor
Inductor is commonly used in the circuit “L” plus a number, such as: L6 means the inductance number 6. Inductive coils are made by winding insulated wires around a certain number of turns on an insulated skeleton. DC can pass through the coil, the DC resistance is the resistance of th...Read more -
Capacitor
1. The capacitor is generally represented by “C” plus numbers in the circuit (such as C13 means the capacitor numbered 13). The capacitor is composed of two metal films close to each other, separated by an insulating material in the middle. The characteristics of the capacitor are It ...Read more
