01-11 | Industry
Can be high density: The high density of printed boards can grow with the integration of integrated circuits and advances in mounting technology. High reliability: Through a series of inspections, tests and aging tests, the PCB can be reliably
01-11 | Industry
The image is fed back to the device processing by the optical reaction principle, and compared with the logic judgment principle or the data pattern of the design, the defect position is found.
01-11 | Industry
Browning purpose: (1) roughening the copper surface to increase the surface area in contact with the resin; (2) Increasing the wettability of copper against flowing resin; (3) Passivation of the copper surface to avoid adverse reactions
01-11 | Industry
SMT assembly equipment can be divided into 7 categories, and different categories are for different production steps. The following is a classification of SMT production lines: According to the board welding process: there are wave soldering equipment
01-10 | Industry
In fact, the "Conformal Coating" also have anti-vibration, anti-friction, improve the insulation strength, prevent the failure of the printed circuit assembly board (PCBA), guarantee and extend the service life of the product. Coating technology is
01-10 | Industry
PCBA is prone to buckling when some sub-boards are assembled. If there is a chip capacitor around the daughter board connector, cracking is likely to occur.
01-10 | Industry
How to avoid the case where the pad does not match the component pin size. For the arc-shaped surface end welding surface, the pad must be in contact with the welding end due to the influence of the arc.
01-10 | Industry
SMD components are much smaller than DIP components. Generally, SMT can reduce the size of electronic products by 60% to 70%, and the density of mounted components is higher.
01-10 | Industry
BGA has a large pad package but the solder jointa is small. BGA layout design requirements 1.Place the PCB near the transfer side as close as possible. Because the deformation is relatively small during soldering.
01-10 | Industry
Printed circuit board (PCB) is one of the most common names, and can also be called "printed wiring boards" or "printed wiring cards". Before the PCB appeared, the circuit was made up of point-to-point wiring. The reliability of this method is very lo
01-10 | Industry
1. Considering the difference between product process and storage conditions, the printed board should be used in time (recommended within 24 hours) after unpacking, and it is recommended to pre-dry before use, especially the PI substrate in
01-10 | Industry
While in the PCB design the engineer will reserve positioning holes for printers and placement machines using. Different devices may have different requirements about positioning holes. Generally, a pair of positioning holes are required at both
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