Gold, silver, copper in PCB board
PCB as the support body of electronic components, its surface needs to be welded components, it requires a part of the copper layer exposed for welding. Hence the need to brush solder resistance paint.
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Three reasons tell you why PCB board copper dumping situation
When the copper wire on PCB board is soaked in etching liquid for a long time, it will cause some fine line backing zinc layer to be completely reacted off and separated from the substrate, that is, the copper wire falls off.
A brief discussion on the cause of bubbling on the copper plating surface of circuit board
The complexity of PCB production process and process maintenance, especially in chemical wet treatment, make it difficult to prevent the surface foaming defects.
What is the use of gold, silver and other precious metals on PCB
Whether gold or silver, the purpose of the process itself is to prevent oxidation, protect the pad, so that it in the subsequent welding process to ensure yield.
Basic inspection of PCB board
The quality of PCB directly affects the quality of the whole electronic products, PCB testing is a timely detection of problems, but also a necessary means to prevent more defective products to reduce losses.
The advantages and disadvantages of common PCB surface treatment technology
The OSP acts as a barrier between the copper and the air. Simply put, it chemically grows an organic film on a clean, bare copper surface. The only function of this organic film is to ensure that the inner copper foil does not oxidize before welding.
Visit PCB manufacturers need to pay attention to what problems
Field observation is a practical investigation method, which is of great reference significance for the internal self-understanding and improvement of PCB manufacturers, as well as the understanding and selection of suppliers.
Discussion on metal substrate of PCB circuit board
There are three main types of metal substrate: aluminum substrate, copper substrate, iron substrate. Iron substrate is rarely used in the market, here the focus of analysis is aluminum substrate, copper substrate.
PCB routing guide
In PCB design, wiring is an important step to complete the product design, it can be said that the previous preparatory work is done for it, in the whole PCB, the wiring design process to limit the highest, the most fine skills, the largest workload.
Color of circuit board
In order to prevent oxidation of copper layer in PCB board, separate welding and non-welding parts and protect PCB surface, the color of PCB board is also mainly determined by the color of solder resistance paint.
What are the rules of industrial PCB circuit board maintenance?
Industrial circuit boards should pay attention to heat dissipation problems; The second is printed board copper foil line, poor quality circuit board power supply line copper foil is very thin, easy to burn due to the current.
What specific measures should be implemented to produce high reliability PCB boards?
Whether in the manufacturing and assembly process or in actual use, PCB to have reliable performance, this is very important.
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