How is the surface of the circuit board foaming caused?
Circuit board bubbling is actually the problem of poor binding force on the board, and then by extension, the surface quality of the board, which contains two aspects，
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Blind hole board fabrication knowledge of circuit board
Notice When the laser holes and the inner buried holes are inserted together, that is, the holes of the two drilling belts are in the same position, you need to move the laser holes to ensure electrical connection.
What is the function of PCB board printed circuit surface plating process
the current motherboard, memory and graphics card and other equipment "gold finger" is almost all made of tin material, only part of the high performance server/workstation accessories contact point will continue to use gold plating, the price i...
Hd understand the basic architecture of tight HDI board PCB
With the introduction of surface mount technology, automatic detection technology of circuit board is applied, and the packaging density of circuit board increases rapidly.
Detailed analysis of the basic knowledge of circuit board
The circuit board makes the circuit miniaturized and intuitive, which plays an important role in the mass production of fixed circuit and the optimization of electrical appliance layout.
On the difference of circuit board each surface treatment process
Spray tin is divided into lead spray tin (i.e. hot air flat) and lead-free spray tin. Below you can see the difference between the various processes;
Why should the PCB board be blocked?
This process can ensure that the oil cover through the hole is good, the plug hole is smooth, the wet film color is consistent, the hot air leveling can ensure that the through hole is not tin, no tin beads in the hole, but it is easy to cause the ink pad
Why is the common PCB board thickness 1.6mm
as PCB substrate epoxy resin (see the column of PCB substrate resin chapter), PCB substrate reinforcement materials, copper foil and other manufacturing technologies have not realized commercial production.
PCB board, the rules are very particular
Otherwise, you may be forced to make modifications and redesign your PCB stack structure.
Cause analysis of PCB board defects
This will break the solder joints, bend the shape of the board, or it may cause the copper thread on the board to break.
How to do the precision of PCB circuit board "extreme"?
This technology has become a necessary means of detection in fine wire production, and is being rapidly popularized, applied and developed.
The change of circuit board material with temperature will lead to the change of design Dk and phase Angle
Although both microstrip line and GCPW can be modeled and simulated to predict circuit performance, GCPW is more difficult to process and affected by processing at 77GHz frequency.
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