PCB Tech - How long does it take for PCBA to calculate the quotation?

Under normal circumstances, people say how long it will take to process the latest price of PCBA. This should start from which links are included in PCBA production and manufacturing. Perhaps everyone knows that PCBA is a general term for PCB welding in China. It includes three major parts. (PCB circuit board, SMT patch, electronic component welding), then the latest price of PCBA must be determined by these three parts.

1. PCB board: PCB board materials and board description documents required for the latest price of PCB. If the materials are complete, sort out all the materials. How much is it for a separate charge for special processes, plus other miscellaneous expenses based on the PCB factory A complete set of prices can be quoted within the last 2 hours. If there are many newest prices waiting beforehand, it is a different matter.

Second, SMT patch processing section: This module is mainly an accounting of processing fees. Usually PCBA factories calculate the money according to the number of points. Some are one point by one point, and some are one point for each foot. This is the biggest trick. A piece has at least 2 feet. If one piece is counted as one point, the price per point may be higher than the price per point. Not to evaluate.

Third, the electrical PCBA sub-component module: electronic components include conventional RC and special components. The current market for conventional components is transparent, and it is easier to evaluate the price, but some special BGA/IC will be more troublesome, such as nearly 2 In the tumultuous Huawei incident last year, many special electronic components will involve international embargoes, strict approval procedures, long customs clearance time, and unstable prices. Therefore, the latest price cycle is usually 3 to 4 days.

Cleaning printed circuit boards (PCB) to repair high-purpose products is a delicate process like manufacturing circuit boards. If the wrong cleaning method is used, connections may be damaged, PCB circuit boards may loose components and damage materials. To avoid these defects, When choosing the correct cleaning method, you need to be very careful as you did when you started designing, specifying, and producing circuit boards.

Various pollutants will accumulate on the PCB. It will be more effective to use the correct corresponding methods to solve annoying problems and will reduce headaches. One of the most common situations is the accumulation of dust in or around the PCB. Use it gently Small and delicate brushes (such as horsehair paint brushes) can remove dust without affecting the components. Even the smallest brushes can reach a limited position. For example, under the components, compressed air can reach many areas of the chip factory, but it may It will damage important connections, so be careful when using it.

High-temperature operation may turn certain wax-coated components into dust and dirt magnets, resulting in sticky dust that cannot be removed with a brush or vacuum cleaner. Otherwise, the product will be stained with thick soda water, which will make the wood board. It becomes a mess. Either way, it should be solved before these substances accumulate and affect performance. Most dirt can be removed with cleaning agents, such as isopropyl alcohol (IPA) and Q tip, a small brush or a clean cotton cloth, only in ventilation In a good environment, it is best to use a solvent such as IPA to clean the PCB board in a fume hood.