the general double panel copying board is much simpler than the multi-layer copying board, multi-layer copying board is prone to inaccurate situation, So the multilayer board copy board to be particularly careful and careful (which internal through holes
Although the miniaturization trend makes it more challenging, it is possible to use multiple connector groups on two PCB boards by using best design practices.
The high-rise plate is thicker, heavier and larger than the conventional multilayer plate. The corresponding heat capacity is also larger. When welding, more heat is needed and the welding high temperature time is longer.
In the core structure, all the conductive layers in the circuit board are coated on the core material; In the foil-coated structure, only the internal conductive layer of the circuit board is applied to the core material, and the external conductive layer
If the transmission line is isotropic, there will always be a current as long as the signal is transmitted.
With the 3D capabilities of the layout tool, designers can interactively handle their component placement in real time and correct all clearance errors in the design's mechanical features.
It is a test method in which the assembled plate is supported by two cross bars from the outside of the lower plate surface, and then pressed down from the third point of the upper center to form a plate bend, and then the strength of each solder joint is
That is to say, in a specific storage environment, the quality of the goods must be able to continue to meet the requirements of the specification, and ensure that in the way of use, not because of storage time is too long and failure situation, this can
HDI board is one of the most precise PCB board, and its process is also more complex. The core steps include the formation of high precision printed circuit, the processing of micro through hole, the plating of surface and hole.
Generally practical oxidation in the narrow sense refers to the reaction of direct combination with oxygen. The rusting of various metals, for example, is oxidation. Oxides also refer to various oxides produced, while Oxidizing Agent refers to oxidizing a
general solid insulation material is not easy to fill the dead corners, and where the need to be closely matched, such as high-voltage cables, transformers, small capacitors, can be filled with mineral oil, ethylene glycol and carbon chloride, as liquid i
Sunblock welding process can be roughly divided into three operating procedures:The first step is exposure. The second step is developing. The third operation process repair board.
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