PCBA is one of the basic components of electronic components, PCB it through surface assembly technology (SMT), and the whole process of DIP plug-in insertion, known as PCBA process.
The physical characteristics of flux refer to melting point, surface tension, viscosity, mixing and so on, which are related to welding performance.
Eliminate tin bead operation as far as possible not through direct removal of tin bead, in the production process to pay attention to: 1, steel mesh: 1, according to the size of the welding plate opening, 2, steel mesh but thick, 3, when mounting pressure
Soft and hard combination board is considered appropriate and the use of rigid (FR4) materials and flexible (PI or PET) materials combination, is a kind of both rigid PCB durability and flexible PCB suitable force of the new printed circuit board.
From PCB design to the completion of welding of all components into a high quality circuit board, PCB design engineers and even the level of welding process, welding workers and many other links have strict control.
Engineers in the whole process of PCB design, in order to save time all want to ignore the table bottom of the whole board laying copper this link.
Input impedance is no different from a normal reactance element, which reflects the amount of resistance to current. For a voltage-driven circuit, the greater the input impedance, the lighter the load on the voltage source,
Because the copper plating is not satisfied, the hole inside is empty, so it can not be directly punched on the above, to stagger a certain distance, and then hit a layer of empty.
One of the important criteria for determining the requirements for recycling components is to know how to place components on the next board. One of the final standards is the type of component packaging required.
Three anti paint has satisfactory high and low temperature resistance; It cures into a transparent film that tries to protect the circuit from damage in such conditions as chemicals, shock, moisture, salt spray, moisture and high temperatures.
Among many packaging methods, ceramic circuit boards have gradually become the ideal packaging substrates for new generation integrated circuits and power electronic modules.
PCB processing belongs to OEM customers OEM products, not the same customer customized products are different, so PCB processing there is a variable price.
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