How to improve the SMT patch processing quality?First, select technical personnel, second, ensure the accuracy of equipment, third, set up quality detection control points, fourth, improve the management system, five, formulate rules and regulations
Take your choice of PCB substrate quality：1. Gold plate, 2.OSP plate, 3. Silver plate, 4. Gold plate, 6. Tin-spraying plate
In the era of HDI high-density connection technology, the line width and line distance will inevitably become smaller and denser, and thus a different type of PCB structure is derived.
In modern high speed digital circuit design, the influence of hole on PCB signal integrity cannot be ignored. In the multilayer plate, the hole can play a good connection role, its parasitic capacitance and inductance can be ignored.
Mobile terminal with HDI board is the main point of PCB growth. The mobile terminal represented by smart phone drives HDI board higher density and thinner. PCB all to high density fine line development, HDI board is particularly prominent.
Through the hole plug oil process is one of the hole treatment methods, the first is to opaque, above must have ink cover, plugging; The second is the hole can not appear yellow phenomenon, and do not touch tin.
PCB board surface bubbling may be the problem of poor binding force on the board surface, and then extension is the surface quality of the board.
The crystal vibration does not vibrate during product debugging, which may be due to the crystal vibration device itself or PCB design.
Board bubbling is one of the most common quality defects in PCB production. Because of the complexity of PCB production process and process maintenance, especially in chemical wet treatment, it is difficult to prevent board bubbling defects.
After years of development, the PCB industry has also extensively upgraded its processes and capabilities. Some PCBS that were previously considered exotic will soon be considered routine.
The abnormal quality of PCB board will cause direct losses to customers and PCB manufacturers. The loss of copper wire is one of the abnormal quality phenomena, but this kind of abnormal will cause greater losses to PCB manufacturers.
The PCB industry has been shifting its focus to Asia, gradually forming a new pattern with Asia as the center and other regions as the auxiliary. The Asian continent has become the main production base of PCB and its high-end products HDI in the world.
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