PCB welding resistance blistering is a problem that many PCB factories inevitably appear in the processing of PCB, so what causes the welding resistance blistering? The following is for you to sort out the introduction.
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The improvement of etching quality is closely related to the acceleration of etching rate. The faster the etching speed, the shorter the time the board stays in the etching solution, the smaller the amount of side erosion, and the etched pattern is clear
Therefore, on SMT printed boards, through holes are used only to connect the wires on both sides of the board, the number of holes is much smaller, and the diameter of the holes is much smaller. In this way, the assembly density of the circuit board can b
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Another term we should avoid is touch-up. In this industry, many employees consider repair welding to be a normal and acceptable part of the assembly process. This is unfortunate, as rework and repair of any kind should be considered undesirable.
The design of printed PCB circuit boards starts from determining the size of the board. The size of printed PCB circuit boards is limited by the size of the case shell, so as to fit into the shell.
The increased cost caused by EMC on PCB board is usually caused by increasing the number of layers to enhance shielding effect and increasing ferrite bead and choke to inhibit high frequency harmonic devices. In addition, it is usually necessary to match
At this time, even if only a small high frequency current flows through the wire, there will be a certain high frequency voltage drop. Therefore, for high frequency circuits, the PCB layout is as compact as possible so that the printed wires are as short
After careful consideration and prediction, the design of online circuit testing can be carried out at the early stage of design and realized at the later stage of production process.
transfer personnel once lifted the amount of the board is too much, the component is too large, the board is not lifted when transferring, but dragged up along the trend, constitute the board Angle and the board surface conflict and scratch the board surf
With the continuous development of science and technology, especially information technology, the process technology of printed board production is improved accordingly to meet the needs of different users. In recent years, the development of communicatio
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