The current wave soldering is usually composed of plate loading system, flux coating system, preheating system, welding system, electrical, mechanical structure system structure system.
According to the requirements and requirements of failure analysis, it is necessary to adopt various analysis techniques and methods to determine the location of failure, the degree of failure, the cause and mechanism of failure.
The establishment of more and more circuit board recycling plants, to a large number of waste circuit boards to provide the final place, but also to better protect the environment and their own health.
10 advantages of soft PCB: flexibility, reduce volume, reduce weight, consistency of assembly, increased reliability, electrical parameter design controllability, the end can be the whole solder, material use option, low cost, continuity of processing.
The simplest multilayer soft PCB is a three-layer soft PCB formed by two layers of copper shielding on both sides of a single-sided PCB. The most commonly used multilayer soft PCB structure is the four-layer structure.
The rapid development and popularization of SMT processing has played a unique role in promoting the development of modern information industry.
The physical treatment of waste PCB mainly includes mechanical crushing, air separation, magnetic adsorption and other technologies; Chemical method is divided into pyrometallurgy, hydrometallurgy and so on.
Soft board is a printed circuit board made of flexible insulating material, which has many advantages that rigid printed circuit boards do not have. Rigid circuit boards can be high-density.
In 1936 a radio was built with a printed circuit board. In 1943, PCBS were widely used in military radios. In 1948, PCBS were officially approved for commercial use. On June 21, 1950, Paul Essler was granted a patent for his invention.
The number of layers of the multilayer board is not limited, there are more than 100 layers. Relatively speaking, PCB with even layers does have more advantages than PCB with odd layers.
In the PCB industry using laser marking two-dimensional code technology, can realize PCB production, process, quality traceability, and realize the automation, intelligent management requirements.
So what are the factors that affect the price of a PCB board? 1, PCB material difference, 2, surface treatment process difference, 3, PCB itself difficulty difference, 4, copper foil thickness difference, 5, customer quality acceptance standard difference
