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The original SMT stencil was manufactured primarily by photolithography and then by chemical etching. Of course, laser cutting or electroforming is used to process the SMT stencil. In the process of continuously producing and processing SMT steel mesh, it is found that the three processing methods have their own advantages and disadvantages. The advantages and disadvantages of these three SMT steel mesh processing methods are compared below:
Why do PCB boards need to be impedance? The impedance of the PCB board refers to the resistance and the parameters of the reactance, which hinder the AC. Impedance processing is essential in PCB board production. The reasons are as follows:
In the current stage of rapid economic development, the use of linear modules has become more and more common, and more important, in our daily lives, but many people do not know how to choose linear modules. In order to help everyone solve the problem, there are some problems about the linear module.
Many of the characteristics of each mechanical product come from its different factors, probably because of its overall installation process, or because of its accessories, as well as its external drive components. There are many possibilities for a mechanical product to have this feature.
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