It is necessary to have common dimensional planning criteria in the design process, otherwise most electronic components in the market cannot be achieved. Such wiring design rules are the design criteria of the PCBA board.
The performance, quality, processability, manufacturing level, manufacturing cost and long-term reliability and stability of PCB depend largely on the copper clad plate material.
In the absence of any schematic condition to a relatively unfamiliar circuit board maintenance, although the hardware knowledge of deep people are full of confidence in maintenance, but if the method is not appropriate, the work is still twice the result.
Fault PCB completely consistent PCB board maintenance has a great reference value. Repairing several identical broken circuit boards at the same time is often more convenient and easier than repairing a single broken circuit board.
Impedance is usually denoted by z, z is a complex number, the real part is called resistance, the imaginary part is called reactance, and the unit of impedance is ohm.
As the carrier of various components and the hub of circuit signal transmission, PCB has become the most important and key part of electronic information products. Its quality and reliability determine the quality and reliability of the whole equipment.
Environmental protection products in addition to not toxic, but also require the product can be recycled after waste.
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. This three-layer soft PCB is electrically equivalent to a coaxial wire or a shielded wire.
Every smart appliance or non-smart appliance is controlled by a circuit board, and each circuit board will have its own life, that is, the expiration date.
Literally, it is a technique for welding electronic parts to the surface of a PCB, unlike earlier through-hole parts, using "wave welding", which drastically reduces the size of electronic products to make them lighter, thinner, shorter and smal...
Optical Inspection and Electrical Inspection include PCB manual Inspection, PCB online inspection, PCB functional inspection, PCB active optical inspection, PCB Automatic X-ray inspection and PCB laser inspection. A total of 6 detection techniques.
At present, many circuit board surface treatment methods, the cost of electroplating nickel gold is relatively high compared with other surface treatment methods, in the case of gold prices are so high, has been less used, unless there are special uses.
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